http://securosis.com/2008/07/08/dan-kaminsky-discovers-fundamental-issue-in-dns-massive-multivendor-patch-released/
More info at: http://www.doxpara.com/
Neat. :)
It's pretty cool, but in my opinion Kaminsky handled it really badly. He was more interested in hyping it up for Blackhat than for actually helping people.
H D Moore has already added an exploit for it to Metasploit:
http://www.caughq.org/exploits/CAU-EX-2008-0002.html
Fun stuff! :)