goZone claims to offer "extreme personalized search", a phrase that strikes me as more amusing than meaningful. They appear to have tried to combine A9's search history with Google's profile-based personalized search. I wasn't impressed when I tried it out, but your experience may differ.
Curious how many people are trying to hop on the personalized search bandwagon. But I haven't seen a single compelling implementation yet. Doing personalized search right isn't easy.