I just visited the Toyota Japan Website, and Guess what? That's right, they're going to offer the 1ZZ-FE in the bB called X"NEO Edition". It'll be available in both FWD and AWD models (about 1,800,000 [$16,200] and 2,100,000 yen [$18,900] respectively). This news is what I've been waiting for for a while, now no questions as to if it will fit, and whether anyone is lying about a swap, as now Toyota is putting them in stock.
Check it out:
http://www.toyota.co.jp/Showroom/All_toyota_lineup/bB/

nope...it's a different car...

http://www.scionlife.com/forums/viewtopic.php?t=15836&highlight=neo+edition