Eclipse Indigo is 3.7, and Eclipse Juno is 4.2, but 3.8M1 has just been released. What's 3.8 and how is this different from 3.7? I'm eagerly awaiting Java 7 support and am confused whether I should use 3.8M1 or wait for 3.7.1
...the feature and API set for the next feature release of the Eclipse SDK after 3.7, designated release 4.2 and code-named Juno. This release is occurring simultaneously with the 3.8 platform release. The 4.2 release is a mature platform release containing significant new feature work, while the 3.8 release focuses on stability and bug fixes.
From: http://www.eclipse.org/projects/project-plan.php?projectid=eclipse
Also, Java 7 support began with 3.7.1: