Many thanks to Matt and Jeff, two of our intrepid E3 goers, for compiling a list of all 27 playable Wii games and the playable virtual console games.
Wii titles:
Remote Pointer Demo: Table Tennis
Remote Pointer Demo: Obstacle Course
Remote Pointer Demo: Shooting
Wii Sports: Tennis
Wii Sports: Golf
Wii Sports: Airplane
Wii Sports: Baseball
Wii Music: Orchestra
Wario Ware Smooth Move
Metroid Prime 3: Corruption
The Legend of Zelda: Twilight Princess
Super Mario Galaxy
Excite Truck
Project H.A.M.M.E.R.
Red Steel
(Activision) Tony Hawk's Downhill Jam
(EA) Madden NFL 07
(Hudson) Bombermanland
(Konami) Elebits
(Namco) One Piece
(Namco) SD Gundam
(Namco) Final Furlong
(Namco) Dragonball Z Budokai Tenkaichi Z
(Sega) Super Monkey Ball: Banana Blitz
(Sega) Sonic Wild Fire
(Spike) Necro Nesia
(THQ) Spongebob Squarepants
Virtual console games:
Bonk
Super Mario World
Super Mario 64
Super Mario Bros
Sonic the Hedgehog