I just stumbled across
this article on /.. Seems Wikia is finally up to the challange to create an open source search engine - not that it didn't exist without it. Indeed,
Grub has been around for quite a while, but it was pretty dead.
Now all we can do is to hope that it won't be another brain damaged project and will actually work. It's about time a p2p open source search engine would pop up.