OK, the hardware still sucks but WebOS 2.0 is easily the best mobile multitasking out there. (And this is even givent he fact that the guy doing the demo never showed the VERY powerful "quick actions" and "just type" stuff):
http://www.webosnation.com/managing-your-webos-20-workspace
http://www.webosnation.com/managing-your-webos-20-workspace