I’ve recently discovered Comix Remix on Comedy Central, and it’s quite good. Each half-hour show is a greatest-hits of stand-up with clips from many comics — much like a greatest-hits album, you can get all the best bits this way :).
Comix Remix airs Mondays at 10/9c on Comedy Central, and last week’s show featured clips from Richard Lewis, Margaret Cho, and Dave Attell (among other comics).