First time I've seen that. It usually tells you if you were approved or denied.
Mine said,
"Your Case Status: Post Decision Activity
On December 14, 2012, we mailed you a notice that we have approved this I821D Consideration of Deferred Action for Childhood Arrivals. Please follow any instructions on the notice. If you move before you receive the notice, call customer service at 1-800-375-5283.
For approved applications/petitions, post-decision activity may include USCIS sending notification of the approved application/petition to the National Visa Center or the Department of State. For denied applications/petitions, post-decision activity may include the processing of an appeal and/or motions to reopen or reconsider and revocations."
Maybe it differs from each Service Center or person processing your application. You're going to have to wait until the letter arrives to know the decision I guess.