Yes! Wii Bowling is Fun!
Then I sat back down - and bowled the next four games. People, my heart rate by the end of the five games (20 minutes real time) was around 134 - and I had broken into a sheen of sweat! I haven't reached that level of exercise in YEARS!
Seriously, if you're morbidly obese - or like me you've reached super-morbid obesity status - get yourself a Wii and start playing the Wii Sports games that come with the system. If I can play at that level of exercise for 20 minutes and more, so can you!