Transformers: The Movie (game)
There are others, but I don't remember all of them. PS3 games will only advertise 1080p if they render at 1080p. If they say "...upto 1080p" it means it's not truly running at 1080p.
All Xbox360 games say 1080p on them now that the console supports 1080p.
I think the only ones that do 1080p on the Xbox360 are VirtuaTennis 3 and NBA Street Homecourt.
Some of the less graphically intense games (Xbox Live Arcade, and the PS3 equivalent I guess) use 1080p. Otherwise, it's typically older games that supported 1080p. The Xbox360 has so few games that support 1080p because for a long time the console didn't support 1080p output (it was added in an update).