How to Install GWT Plugin for Eclipse on 3.8 or Juno:

1. Download zipped update site for 3.7 from http://code.google.com/eclipse/docs/install-from-zip.html
2. Unzip content.jar; rm content.jar
3. Edit content.xml; change
<required namespace='org.eclipse.equinox.p2.iu' name='org.eclipse.platform.feature.group' range='[3.7.0,3.8.0)'/>
to
<required namespace='org.eclipse.equinox.p2.iu' name='org.eclipse.platform.feature.group' range='3.7.0'/>
4. jar cMf content.jar content.xml (zip won't work)
5. Install from local update site (select "Contact all update sites during install to find required software) EDIT: don't select Android-related items. (Thanks lOranger!)
6. Profit!
Tested with 3.8M5 and Juno M5

EDIT: I haven't tested it properly, but try this unannounced update site for Juno GA: http://dl.google.com/eclipse/plugin/4.2 - thanks Albert Attard!
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