Tezaa
A self proclaimed “opinion engine” and an online search community driven by polls. Straight from their About page on how Tezaa can benefit its users: “Tezaa can help you make better choices by knowing what your peers think.” Check it out and judge for yourself.
Socialgrapes
Can help you search user profiles from most of the major social networks. Pretty cool I guess if you are looking to connect with a specific person and don’t want to bother to go to each individual social network. On first glance I thought it was a search engine for wine, go figure.
Explode!
Similar to Sociagrapes but better presentation and easier to use.

oSkope visual search
My favorite of the bunch. Nice presentation and handy if you ever find yourself looking for images for hours and want to shake it up a bit. Because it it pulling images from other sites such as Flickr and Amazon it can be painfully slow to load at times.

Hungry for more Search? Check out Mashables list of 40+ Social Search Engines.