Hmm. I might have some rare stuff... some of it great.. some of it crap.
Great stuff: Mechwarrior 3, Global Domination (fun game by Psygngnosis, need to check if it works under W7)
Bad stuff: Sudeki (pretty Characters.. bleeeeh gameplay and bugs), The time machine, Martian Gothic, Ar'Kritz (that game didn't make any sense) and extermination (by Techland, for PC).
I'm fully aware that these games might not be that rare.. but they're not usual either.
Edit: woo! global domination running on W7 without problems!