The Eclipse 3.4 M5 milestone was released on February 7.
The release notes contain full details on what's new, and what's fixed, but here's a short rundown on the main points of the release.
The Plugin Development Environment has a new editor to create Context Help for your plugins, and a way to easily convert existing JARs into a plugin project.
The main changes to the Java editor are the improvement of annotation formatting and an experimental breadcrumb feature, to show the path to the element at the current cursor position.
There's more information on this feature in the JDT team's blog
The Platform has bundled all plugins needed to create a help system for an RCP application in a feature, and further customisations have been made for the welcome page. These changes will help developers basing their applications on the RCP to provide better usability.
There's also an API added to allow any control to be printed to the graphics context - giving the chance to take a snapshot of any widget.