You don't see too much Flash on TGP's at all. As a matter of fact, I don't know of any at all.
I am using Flash on a TGP I'm working on -
Impure Thoughts. I'll make a smaller Flash file for the title there when I start getting traffic, but impressive Flash effects can be accomplished with very small files - almost as small as a similar gif or jpg.
I'm just curious, has anyone seen any TGP's out there that use Flash?