The main issus with DNS is not so much if YOU have patched, but rather if your ISP and all their upstream servers have.
HDMoore’s Austin ISP of AT&T didn’t patch in a proactive manner. If you are holding back on the patches on your SBS box for fear that they will have issues, we know the known issues (see http://blogs.technet.com/sbs).
But please take mitigation action. Consider flipping to opendns.org as your forwarders, stop and restart your DNS services.