(The tooth was sold in auction (which in itself is profoundly disturbing), and bought for just under £20,000 by Canadian dentist Michael Zuk.
He is now attempting to sequence the DNA, which is the first step in the cloning process. (He's also selling Lennon DNA pendants and tooth dust.)
You can follow the story on http://www.johnlennontooth.com/
Yes, that is a valid web address.)