Ian Clarke, cofounder of Revver and recently defunct Thoof has launched a new project called SenseArray. I can't speak on SenseArray's merits just yet, but they seem to be building on a solid core principle:
The basic idea behind SenseArray is simple: the success of almost any website or service depends on your ability to figure out what your users want, and then give it to them as expeditiously as possible.
You don't need SenseArray to do this on your Web site. That's the role of Personas and Conversion Profiling.
And you can do much with your own CommonSenseArray application that is hosted in your brain.