Hi,
I am in the same boat. I am not sure what they mean . I think for RFE, they will clearly mention that RFE. Let's hope for the best. Keep you posted.
Here is the message that I see online ..
Application Type: I131, APPLICATION FOR USCIS TRAVEL DOCUMENT
Current Status: Document mailed to applicant.
On November 6, 2007 we mailed the document to the address we have on file. You should receive the new document within 30 days. If you do not, or if you move before you get it, call customer service.
Approval notice would be like this:
Current Status: Approval notice sent.
On October 2, 2007, we mailed you a notice that we have approved this I131 APPLICATION FOR USCIS TRAVEL DOCUMENT. Please follow any instructions on the notice. If you move before you receive the notice, call customer service.