TouchArcade forum user arta ran across this promotional video for Tony Hawk Pro Skater 2 for the iPhone that looks impressive:
The description of the video claims the following:
All 10 levels plus 3 bonus levels with incredible graphics and blazing frame rate make this THE definitive skateboarding game for the iPhone. Tony Hawk in all his glory!!
Tony Hawk Pro Skater 2 was originally released in 2000 for the Playstation and has been followed up with a number of sequels. The video looks quite convincing, though we haven't heard official confirmation of this title coming to the iPhone.