The patch that was pushed out a week or so ago fixed the stagefright vulnerability. My SF detector app confirmed that. Unfortunately, someone discovered that it either opened (or missed) another vulnerability. Lookout and Zimperium updated their apps and guess what? I'm vulnerable again.
Meh... there's nothing that I can do about it, and I'm sure it will be fixed in short time. In the meantime, I've disabled "auto retrieval of MMS" and I don't go around posting my cell phone number on every site saying "hey, text me, follow me, let's chat". I'm not that hard up for friends. I think I'm pretty safe.
Go to the Android Central site and read up on Phil's commentaries about the Stagefright issue... he's concerned, but not overly worried at this point.