... err... well 3 actually.
One of which I've already blogged about - googlewhacking
The second is Googlism which I've known about for ages - it tells you everything that Google knows about you.
The third is my latest and favourite web discovery. Googlefighting Enter 2 words and find out which of them wins in the Googlefight. I'm happy to report that in a fight between me and the rest of you I win 713,000,000 to 33,700,000
Ner ner na ner ner.