I've thought about it. I bought a 360 that i selcom play - I travel too much to carry it with me, so my brother usually has it.
The Wii is enticing in that I'm not a serious gamer - I prefer to hang out with my friends who play sometimes. The Wii looks like a fun thing for everyone to do. I hang out with a lot of women who don't sit and play games - we usually go out. The only video game we have ever all agreed on is Guitar Hero.
The Wii has the opportunity to get lots of people involved. It just looks like a fun thing to do with a large group, rather than sitting mindlessly on the couch and shooting aliens.