I have installed and worked on ubuntu linux release 12.04. I found it little bit more featured and advanced than the release 11.10.
The main feature and modification that I found was the configuration is getting more user friendly and and the terminal typing is also a little bit more featured along side it is now getting easy to solve out the network issues while assigning DNS and Gateway support for the ping.
Now the configuration is so useful and good that we can give access for any kind of website we want for ping and also special access for separate user under a network is also very productive and secure.
I am totally new for the OS and expecting to get some more feature rich services from Ubuntu Linux distributors in next releases.