Better Subversion support in general. Specifically:
- Integrated svn blame support in the editor (showing author and revision number per line, possibly color coded by age).
- A dialog for viewing all modified files in the project (or from any point in project tree perhaps) with drag & drop to and from commit lists.
- General beefing up of the Subversion support. Currently I dont trust SlickEdit enough (ie things dont always work or work as I expect them to) to use as my primary interface to Subversion.