Tim:
We can do this, but in a somewhat limited fashion, for CVS. Go to Tools>Version Control>Setup, and click the "Setup" button. Check on "Use CVS status for file bitmaps on project toolbar".
This is a little limited - it communicates directly with the CVS server. For the sake of performance, it only checks dates to show if a local file is modified or not.
I hope that we will rework this feature for a future version.
Hope this helps,
Dan