afaik, bada doesnt support "real" multitasking...?! you can only multitask the pre-installed programs, but as far as 3rd-party-apps are concerned, only one can run at the same time.

other than that, the wave is one hell of a sexy device. i've always been a big samsung-fan, but the reason why i switched to nokia was they didnt have a open OS and no decent device with hardware-keyboard.
and judging by the current situation, i'm going to stay with nokia for some time.
samsung makes nice feature-phones though (i love my jet <3 )