The Internet Storm Center shares some good informaton on these developments and practical safeguards. Only 3 days after the update, POC code is beginning to circulate. Here's hoping we have more time as malicious individuals are most likely reverse engineering the MS04-028 patch.
MS04-028 - ISC reports Proof of Concept rumors http://isc.sans.org//diary.php?date=2004-09-17 McAfee, Symantec, and possibly other AV providers offer MS04-028 detectability but getting Windows/Office patched up is the best defense of all.
MS04-028 Security Bulletin http://www.microsoft.com/technet/security/bulletin/ms04-028.mspx MS04-028 Recommendations (Excellent Step-by-Step guide)
http://www.microsoft.com/security/bulletins/200409_jpeg.mspx
MS04-028 Recommendations (More Technical)
http://support.microsoft.com/default.aspx?scid=kb;EN-US;873374