Is AMD or Intel a more linux-friendly (Free software-friendly)
company? I feel the answer is AMD but I'm not sure.

In my opinion, both are quite open source friendly.

tisme-ga

I agree with Tisme, both companies seem quite supportive of open
source in general and Linux specifically.

The only way I could think to even begin to quantify the two companies
level of support was a Google search competition.

Google: Linux site:amd.com
://www.google.com/search?q=Linux%20site%3Aamd.com
41,300 Results

Google: Linux site:intel.com
://www.google.com/search?q=Linux%20site%3Aintel.com
132,000 Results

But that's hardly scientific. 

Of course, there is also Transmeta, a specialist CPU manufacturer that
at one time employed Linus Torvalds.

I think this question might be somewhat unanswerable. 

Regards,
Sycophant

For some reason my search links carried on across line breaks. They are:
://www.google.com/search?q=Linux%20site%3Aamd.com

and

://www.google.com/search?q=Linux%20site%3Aintel.com

I have been running Linux (Redhat, Mandrake, FreeBSD, etc..) on both
AMD and Intel for years.  I'd say both are suitable for Linux.  What
you want to concern are other hardware such as video drive, NIC,
modem, etc.. which are supported or not since let's face it, as much
as Linux has been plug-n-playedly improving recently, not every
hardware is supported.  You won't face this problem when using OEM
vendors such as HP, Dell, IBM, etc..  If you decide to build a clone
system, then go for something more brand name, says NVidia for video
card.

Both of them have tried to be only as user-friendly to Linux as their counterpart.
That way as Intel released more driver support for Linux, AMD tried to
follow, and vice versa.
However, AMD's recent acquisition of ATI will very likely help the
Linux community because even if it isn't as user-friendly as possible,
it surely is substantially more than ATI and therefore it will likely
make ATI more Linux friendly. (something ATI's graphic cards owner
trying to get the most out of their card have long waited for).

If you wish to read more on the subject:
http://www.linux-watch.com/news/NS2331390847.html

Hope I was any help,
Daniel (zefram)

I know Intel actually created an open source project on sourceforge
(http://ipw2100.sourceforge.net/). It's purpose is to provide Linux
drivers for some of its wireless network cards. I'd say that's
extremely open source friendly. Has AMD done anything like that?