Homepage: 
http://www.ubuntu.com/
Download: 
http://www.ubuntu.com/download
Wikipedia: 
http://en.wikipedia.org/wiki/Ubuntu_linux
DistroWatch: 
http://distrowatch.com/table.php?distribution=ubuntu
Minimum Size (megabytes): 
698
Maximum Size (megabytes): 
1589
Last Stable Version: 
12.04
Last Release: 
Apr 26, 2012

Operating System: 

Language: 

Purpose: 

State: 

Media: 

Architecture: 

Notes: 

Ubuntu releases LiveCDs as the "Desktop CD" and DVD. Several versions are updated concurrently, 10.04, 11.04, 11.10, and 12.04 are available.

Comments

Excellent support forum and

Excellent support forum and plenty of documentation online. Every problem can be fixed, or worked around. It has such a large community that someone else has always dealt with the same issues you have dealt with.