NLucene

"I also implemented a search feature on the root site. You can find it here. This is just temporary, I have a couple other items up my sleeve, so I hope to make this much better in future. I still have to write something to repopulate the index, so until I can do that, it will be updated once or twice a day manually. (btw, if you are interested, the search is done using the NLucene project)"
[ScottW]

Yep, I knew it was out there somewhere. Just forgot the name. This little indexer is pretty cool (and open source).