Thanks to Mathias Kinzler EGit have initial support for rebasing. Currently only the simple scenario is supported, when there are no conflicts between actual and given branch. Currently the only place from with rebase action can be launched is in Git Repositories view, the ‘Rebase’ option is available on each branch node for given repository.

If you want to test this new feature you should install EGit for ours “Bleeding Edge Builds” update site.