I've got the Wii and I'll say that it certainly is better than the PS3. I especially like the Virtual Console feature. It's really nice to be able to play classic NES, SNES, and other games that you grew up with.
For anyone who says the PS3 is the hottest thing now, here's an example of its 'hotness'. I work at Wal-Mart, and we got about 10 PS3's in at the end of December. The last one was sold about five days later. Some of them have even been returned! On the other end of the spectrum, we got about 10 Wii's in about a week ago, and all 10 of them sold out within minutes. As far as I know, there haven't been any Wii's returned.