Dude! This system is fun.
I made a new friend in a pool tournament I played in. He invited me to check out bowling, tennis, and baseball. It was totally addictive and we played for hours.
He has a PS3 too, but we never turned it on. The Wii bowling game and tennis are both awesome. I actually broke a sweat returning a continuous volley on the court.
For a guy who usually does not get into video games much (aside from piloting games), the Wii rocks.
I've played PS3, too. In fact I was close to purchasing a PS3, but geeze did this experience ever sway me. But maybe I should do what my friend did and buy BOTH. But I seriously had fun with the Wii.