The Ubuntu zoo of alliteration make their releases a little more fun than other Linux distributions on similar 6 month release cycles. See the timeline here, and take a look back at each product for a touch of nostalgia, as we approach the 20th release and 10 years of Ubuntu Linux.
Warty Warthog 4.10 : Oct 04 : Kernel 2.6.8
Hoary Hedgehog 5.04: Apr 05 : Kernel 2.6.10
Breezy Badger 5.10: Oct 05 : Kernel 2.6.12
Dapper Drake 6.06 : Jun 06 : kernel 2.6.15
Dapper was the first LTS or Long Term Support version of Ubuntu offering 5 years support from the release date. This would have take the update cycle through to June 2011 where security and maintenance updates would have been made available.
Edgy Eft 6.10 : Oct 06 : 2.6.17
Feisty Fawn 7.04 : Apr 07 : Kernel 2.6.20
Trusty Tahr LTS : 14.04 : Apr 14 : Kernel 3.1.13
The latest from Ubuntu with VMware tools included making cloud integration easy and focused for sure on the enterprise ans well as the enthusiast.