I blogged about Tafiti before, it's had a "Halo 3" skin applied since, but you can still see the Original - It's a very nice Silverlight front end for searches done in live search.

We've announced that we are releasing the Tafiti Search Visualization source code to CodePlex, which means any developer can download, modify, and resell the code (see MS-PL License for all the details).

I didn't know it, but we've had "Windows Live quick apps", on codeplex for a while, this is version 5...  Angus Logan has more on his blog. , but he tells me that this post on LiveSide has the best information.