This was posted back in April by Hydro.  I'll just paste it here again since it was good info. (Again, if anyone has anything specific on M.C. I'd like to hear.)

Try these.  I think you'll recognize a few superstars, and be amazed at what's available once you get there.  I've never used any of these, however, I've been to both cities and had porn star experiences in both (How I pulled that off is another story).  So, I don't doubt you'll be able to spend as much time as you want with lot's of European Superstars.  And the price is right, too.  

http://www.zuzana.tv/ (Lara is new and I've seen her in lot's of Euro Porn.  She speaks good English)

http://www.escort-member.com/

http://www.eastmodels.cz/main.htm

http://www.simonaxxx.com/home.php

http://www.kristynaescort.cz/girl.php3?gn=3&gp=0&h=4&lang=2&menu=2

Rumor is that quite a few of these models are available.  Definitely stop by here.  I'd love to hear your experience.
http://www.top-nude.com/

http://www.1st-models.com/models.html

Club Lotos in Prague - I spent two nights at this place.  It's great!  Try out the swimming pool room.  In 98' the price was $120/hr.  I took two girls at a time, at that rate.
http://www.escort.cz/v03/result_e.php?FID=1&Lng=2&Edn=2&Sch=5

http://www.felines.ch/eng/home/indexflash.html