Just a quick tip you you try and use Eclipse under Ubuntu 11.04.
Because of the new global menubar thing (which I do quite like) and a bug with Java applications you cant get to any menu items in Eclipse.
To get round this you just need to run a command before you launch Eclipse. To assist with this I picked up a little script. Simple put this in a file, make it executable and run it:
#!/bin/bash unset UBUNTU_MENUPROXY path/to/eclipse/here
Simple enough but tripped me up for a while.