Ubuntu 7.04 is shaping up to be a mighty release. Linux.com | Report from the Ubuntu Developer Summit
The answer is in the version number 6.06 = 2006 06 6.10 = 2006 10 7.04 = 2007 04 Basically it will be released in April of next year. I am not going to upgrade my Ubuntu installs until the next LTS release. Unless Fiesty is THAT good