There is a photo going around the internet of a wave about to crash at Moldova
that appears to be over a hundred feet high - is this real? What was
the height of the waves(s) at their highest?

Moldova is not even near the Indian ocean, somewhat close to the Black
Sea, which is in Europe, same as Moldova. Someone seems to be joking
on you.

Unless someone has confused Moldova with Maldives?

Many photos have been circulated recently that purport to be of the
Dec. 26 tsunami, but are actually of other events.  Some in the media
have been fooled though:

http://www.editorandpublisher.com/eandp/news/article_display.jsp?vnu_content_id=1000745237

http://www.crikey.com.au/media/2005/01/04-0004.html

There are basically two types of origins of a Tsunami.
1) Earthquake based in the middle of the ocean
2) Land slide based along side the ocean, generally near volcanic activity.

The recent earthquake near Indonesia was a result of an earthquake
that moved the continental plates about 30 feet upwards.  So, the
waves generally will be 30 feet as they are moving through the ocean. 
As the power of the waves reach land they will amplify a slight bit,
but generally not very much.  As stated by this link the waves peaked
around 50+ feet.

http://www.gainesvilletimes.com/news/stories/20050108/localnews/65765.shtml

For Land slide tsunamis, the size can be many more magnitudes more
then an earthquake based.  This is because if a whole side of a
mountain were to slide into the ocean tsunamis of deathly proportions
(100++ feet) are easily reached.

http://www.tsunamicommunity.com/TCgen2.html
"A notable exception is the landslide generated tsunami in Lituya Bay,
Alaska in 1958 which produced a 525 meter (1722 ft) wave."
http://www.wcatwc.gov/physics.htm

This should help you out.

Why didn't you include a web url to the picture? Anyway Moldava is on
the Black Sea and I don't think it has ever had even a tidal surge.
But in 1946 there was a 100 foot tsunami that hit Alaska. Here is the
url to a college web site about it - pictures and all:
http://www.usc.edu/dept/tsunamis/alaska/1946/webpages/

Spooky