I have a confession to make: I shoot jpegs when shooting action sports or weddings. I rarely admit that in public because all the people like Ziggy who expound on the value of RAWs are right.
At weddings, I almost never have dynamic range problems, I know how to get the white balance right and I'm trying to capture moments so I want to shoot fast. Same with action shots, even photojournalism when something is going down.
If I'm shooting landscapes with high contrast lighting I'll shoot RAW for the dynamic range. Having said that, I admire people who shoot everything in RAW. But nothing I hate more than a buffer filling up and the camera bogging down.