I was playing my Hunter in an RBG today, and was camping out a flag while camoed. I was using the /dance animation and spinning around, when I suddenly saw that I had shadow right next to me, even though I was camoed - my shadow.
After the RBG ended, I just went into Org and camoed. Yep - my shadow appeared.
Just hopped onto my Rogue and found that he showed the shadow on the ground even though he was stealthed.
1+ for Blizzard's common sense!