Well, such a nice tool was bound to be aquired by a company. Reflector has been acquired by Red-Gate software. You can find Reflector at http://reflector.red-gate.com.

Speaking of Reflector though, did you know there were over 30 plugins available ?

On the subject of plugins, the excellent TestDriven.net addin for Visual Studio will add a few context menu item for running your tests, but will also add one that allows you to jump back to Reflector. Isn't it nice when all these tools play nice together ?