Not sure what else has been posted about this here, but if you guys check out indyjones.net you'll see that the Wii version is definitely coming, and I'm pretty sure there is a PSP and DS version on the way too. But yeah seems like the 360/PS3 version has been canned, I even just noticed the screenshots that were formerly on LucasArts' Indy site have been removed.
http://www.lucasarts.com/games/indianajones/