Greg Dickerson just posted the following on CSNNE.com:

Celtics forward Kevin Garnett is out on the floor practicing with his teammates after the team raised the curtains for the last 15 minutes for media availability. Garnett is expected to return within the next week from a knee injury.

I'm sure much more will be reported on this as the day goes on. Stay tuned for updates.

Update: Video of KG working on his (deep) jumper.  (via Chis Forsberg) Maybe he wants to participate in the 3 point contest too.

Update 2: Interview and notes via ESPN