I am merely posting this to give a quick update to the process for installing Eclipse with Lucid. It seems that the Ubuntu repositories have finally caught up with the latest release of Eclipse so there is no need to download the package off of the Eclipse website. Just a few terminal commands will do it:
sudo apt-get update
sudo apt-get install eclipse
This should work quite well and it will install Eclipse SDK 3.5.2. You can then proceed as usual with your normal set-up and install of plugins with Eclipse. Enjoy!