I love TV nostalgia. YuppiePunk gives a fairly complete list of stars who sang their own themes—and links to mp3s.

All in the Family was a particular favorite.

Most actors would sacrifice their first born child to score the lead role in a major television series. Especially if that major television series turns out to be a hit. A particularly lucky few have not only landed such gigs, but have managed to pull off the rare ego-stroking double-play of acting in the series and singing the theme song. Because they’re just that talented.

A (Not So) Complete History of TV Theme Songs Sung By Cast Members [Yuppiepunk.com]