Prime candidates:
Animal Crossing WW
Crackdown (off the website)
Def Jam: Icon (off the website, but probably way too early)
Final Fantasy III
Final Fantasy XII
Gears of War
Lost Planet
Marvel: Ultimate Alliance
New Super Mario Bros.
Nintendogs: Pups (although it's been at BB forever, so it might be the new Morrowind Guide

)
Pokemon Mystery Dungeon (Prima & Nintendo Power)
Pokemon Pocket Pokedex
Pokemon Anniversary Hardback Pokedex (which dropped to 9.99, then sold out online)
Pokemon Ranger (Prima)
Rainbow Six: Vegas (9.99, off the website)
Rogue Galaxy (probably too early at this point)
Sonic & the Secret Rings (off the website)
Splinter Cell: Double Agent (fell to 9.99, then dropped off the website)
Virtua Fighter 5 (early, but might we see a new VF5 guide replacing it when the 360 version comes out?)
WoW Atlas
You & Wii
Zelda: Twilight Princess (NP & Prima)