I am a bit confused about the release schedule of Ubuntu. AFAIK, it releases a new version every 6 months right? How about the LTS version?
A new Long Term Support (LTS) version is usually released every two years. The current LTS version is Ubuntu 10.04 LTS (code name "Lucid Lynx"), which was released during April 2010. Thus the next LTS is road-mapped to be Ubuntu 12.04 LTS (code name not yet known), with a release date expected on 26 April 2012.
With the Long Term Support (LTS) version you get 3 years support for Ubuntu Desktop, and 5 years support for Ubuntu Server.
See the wiki.ubuntu.com/LTS article for more information.
