Ditto on SearchTempest. It's a little time consuming to look at the results from each CL site, but if you turn on the auto-hide empty results option it's actually not that bad at all. I'm not sure how jaXed actually works but I do know that search engines like Google return a "stale" result set that can be anywhere from 12-36 hours behind the current postings. That's where SearchTempest shines because it searches every site AT THE TIME YOU CLICK SEARCH rather than queueing results.

Like I said, jaXed may do the same thing in a different format, but SearchTempest is ol' reliable for me.