Just found this on the CM reader blog:
For 72 hours, TC are giving away a free reverb VST (usually 97usd)
I’ve just given it a short play, but it seems pretty good – beats the one that comes with cubase. You can download it at http://www.tcelectronic.com/freetcreverb.asp but this offer ends in a few days!
Edit: oh, and it supports mac