Actually, come to think of it, I never finished the first one either. Guess it's a game you really need friends to play with. There were too many requirements necessary to be able to play multi-player in the original, that's for sure.
But this time around, It's all settled via Wi-Fi. So, maybe that will persuade more people to play.
I just think it's nice to see a full-out online co-op game for the Wii. I haven't played a real co-op game myself in a long, long time. The DS version seems to look good too, in fact, it looks the exact same as the Wii version.
Funny how it seems they'll push the DS' graphical capabilities, some games even containing CGI, whereas the only thing developers seem to primarily focused on for the Wii is how to utilize the Wii remote.