Qube
(Qube v2 is in private beta currently. If you’d like to take an early look, please enter your email to recieve an invitation.)
Qube v2 centers around the concept of browserless search, blending third generation websearch capabilities with user collaboration, free advertising and social networking.
UPDATE 7/9/2006:
Qube is now in public beta.
☍ 13.04.2006