whats it mean? and/or what language is it?

My best guess is that this is a Slavic language such as Estonian or Finnish.

Pinkfreud, 

Both Estonian and Finnish are not Slavic, but rather, Fino-Ungaric.

id really like to know the meaning of this. 

things i know:

it came from Linux's fortune cookie program 
Original fortune cookie filename: linuxcookies (contained in some but not all)

Hint: Fin (i found this hint on the web search i think its allusion to finnish)

its very possible this is nonsense and doesnt mean anything at all.

alot of people use it for a email signature so i just assume it has
some profound meaning.

Dear D. Clark, 

I couldn't find a meaning for the sentence in any natural language, or
even in anything that is not Linux-related or in signatures of people
posting online.

Maybe many (like yourself), think it has some profound meaning.

due to the nature of most of the entries in the 'fortune cookie'
program and the dry sense of humour of most linux geeks im going to
assume this is profoundly funny nonsense, placed there to make people
like me wonder what it means.

Supporting the possibility that the basis for the phrase is Estonian
(or a related language), there is a town in Estonia called Sillamäe.

Sillamäe Linnavalitsus [English language version]
http://www.sillamaelv.ee/tit_eng.html

Nika seems to be a word (as well as a proper name) in Estonian, as is
süä and süa.  I have no idea what they mean, alas.

Pressing on answering my own question..  because i think this may mean
something and my curiosity wont let me stop

since you said Nika is a word i decided to look it up..

http://www.fordham.edu/halsall/source/procop-wars1.html
"The emperor and his consort , with a few members of the senate shut
themselves up in the palace and remained quietly there. Now the
watch-word which the populace passed to one another was Nika [i.e.,
"Conquer"]. . . ."

http://www.gallerybyzantium.com/symbols.html
"The common language of the ancient Christian world was koine (common) Greek."
"The letters nu, iota, kappa, and alpha spell NIKA, which means "conquers."

This page was in the cache but gone from the web and seems to
corraborate the above information...
http://216.239.53.104/search?q=cache:UlZssLtMhcoJ:eng.sochi.cityout.ru/news/2001/07/13/nika/+Nika+means&hl=en&ie=UTF-8
"Nika means "victory"

on the off chance it might translate with a web tool i tried the only
one i found that would translate slavic languages to english .. with
some interesting results

http://www.tranexp.com:2000/Translate/result.shtml

Croatian
sillema sillema Nike have been

Czech
sillema sillema nowher su

Spanish
chair chair nika her

French
trail trail nika su

Turkish
box on the ear box on the ear wedding water

Welsh
y may decrease y may decrease nika buzz

Swedish
herring herring nika su

Slovenian
sillema sillema on no account su

Serbian
sillema sillema Nike are

so im liking the Turkish translation the best 

-----------------------------------
box on the ear box on the ear wedding water
dclark1

I am sorry to have made the error of calling Estonian and Finnish
'Slavic' in my previous comment. Politicalguru is correct. Both are
Finno-Ugric languages.

It occurs to me that there may be some Linux prankishness going on
here. Could the phrase be an anagram, or some other form of wordplay?
I couldn't make anything out of it, anagram-wise, but that seems like
a possibility.

yes that is certainly a possibility, and the most viable theory at this point.

:) but id sure like to know for sure

The best anagram I've found:

LINUS ALIAS KILLS A MEME

Perhaps best way to find out is e-mail people 
who use it in their signature.

I can give you this clues:

It sounds slavic. (Pinkfreud was right in that,
It is not czech or slovak.

 If you take it phoneticly, and in dialect,

 'nika su' could be 'nikde jsem' or 'nekde jsem'
 I am nowhere or or somewhere   (su is 'I am' in dialects)

repetition 'silema silema' would point to a song 

sounds like 'jsi li ma'  -- so you get

If you are mine, If you are mine, 
 ????? I am 

..  based on gradient in slavic dialects, I would place to Ruthenia

What an intriguing question!

One potential answer to this is that it's a mix of languages, and not
necessarily all human languages either.

SU

In Linux su is a command to change the current user. It's often used
to temporarily become root (similar to the Windows administrator
account) to perform specific tasks before then changing back to a user
account that isn't as dangerously powerful.

NIKA

There are firms called Nika International or Nika Consulting but I'm
sure these are a red herring.

Linus Torvalds won the Prix Ars Electronica Golden Nica (also Nika) in
1999. The Golden Nica is the grand prize.

SU and NIKA are both words in Croatian but I don't have access to a
Croatian dictionary.

SILLEMA

However the only uses of sillema that I can find are as a name (nobody
who seems relevant) and in the very phrase you mention.

Best of luck in your search.

Poe

thanks for the comments hedgie and poe, but Im no closer to finding
the answer to this - we have some hunches and some theories but no
real leads on the true meaning or lack thereof.

Ive tried finding some peoples email addresses that use/used this and
i sent them an email entitled Can you Help? with a link to this
thread, maybe ill catch one

at first i thought this would be easy to find out, i figured some
savvy linux geek would step right up to the plate here, call me and
idiot for not knowing and and claim his two bucks hehe, not so i see,
maybe more money would bring them out of the woodwork?

thanks for the comments hedgie and poe, but we are no closer to a real
meaning or lack thereof, we've got some valid hunches and theories, im
beginning to think the only way to really find out is to track down
the programmer that put it into the fortune cookie program. I dont
even know if this is possible?

ok i tried finding some peoples email addresses that use/used this and
i sent them an email entitled Can you Help? with a link to this
thread, maybe ill catch one.

at first i thought this would be easy to find out, i figured some
savvy linux geek would step right up to the plate here, call me an
idiot for not knowing the obvious meaning and claim his two bucks
hehe, not so i see, maybe more money would bring them out of the
woodwork? not too much more though i really dont care that much.