Tried Thebyani rom, both version 3.1 and version 3.0.
Both very stable, had no problems with the market or running any apps, stock ICS looks beautiful and NOVA launcher really adds to it (the ability to add up to 15 different toggles in the notification bar is awesome) and the restyled youtube and gmail apps are miles ahead of the old ones.
Problems I have encountered include the fact that your cannot import music playlists from the stock music player (so you'll have to recreate all your playlists), also the roms do not include swype (states they do in the changelog though?) you can install swype beta (includes dragon dictation and a better dictionary) but i couldnt get my old dictionary to import properly. Also haven't been able to restore wifi passwords through titanium backup.
Another con I found is that it doesnt seem possible to choose what order apps are installed in and what pages, they are just done alphabetically, annoying since I like to group similar apps together.