A few suggestions:

1. SPS and STS on same machine

2. Tree view of Categories and Folders

3. General Discussion Web Part

4. Personalization of Dashboards

5. Role Customization

6. Email to say WHY a document has been rejected for Approval

7. More ways to customize the interface

8. Backup and restore an individual Workspaces

9. Filter for Visio

10. Better way to track activity on SPS

11. Ability to Save as from Adobe to space on My Network Places