I am trying to use GWT and I am very new to it. Following the doc, I tried to install the GWT plugin for Eclipse but then I have an error message :
Cannot c
I had the same issue, but I think it's because I was using eclipse Juno (the google documentation says to use indigo). The jetty project recently moved under the eclipse umbrella, and the jetty bundles (org.mortbay.jetty.server) were renamed (see http://www.eclipse.org/proposals/jetty/). Thus the 3.7 google plugins wouldn't be able to resolve dependencies correctly.
This is because you're attempting to use the latest Juno build, 4.2, with a plugin link for 3.7.
Use the following update site: http://dl.google.com/eclipse/plugin/4.2
Everything should work fine now.
If you still want the earlier (3.x) version of the plugin try copying the plugins directory of some team member who already has that version of the plugin installed. I couldn't imagine the reason why google decomittioned the previous version of the plugin!