Yes! I love the Paper Mario series! I'm getting this game when it comes out even if I don't have a Wii yet. Just like I bought Trace Memory and Animal Crossing before I had either system. (Yes, I got the GC in late 05 and the DS in late 06).
Mario RPG's, to me, are much funner than the other Final-Fantasy type RPG's. I think it's the way that they're set up. So addictive and you can actually see the enemy before you get into a battle.