New exploits are comming at blazingly fast speeds
Protect Against Exploit Code Related to Security Bulletin MS04-011
Code is available on the Internet that seeks to exploit issues addressed in the Microsoft security updates of April 13. Find out if your system is at risk and how you can protect against it. (April 22, Announcement)
Yep, it took them just a week (orso) to provide script kiddies an exploit. So make sure these people do not get a chance to ruin your day! Do the Windows Update, or check out the workaround in the article.
If you are reading this, do the update, there is no, absolutely no reason not to do it. If you are concerned about downtime of your website, well consider not patching the website, and being attacked while you are contemplating. What is worse? Being down because you are improving security, or being down because you neglected security? In this world (not the ideal one) you should have a staging area and should have patched that one first and done/be doing your tests. By now you should have the knowledge (and gut feeling) to make the decision to go live with the patch or use the workaround. It is the internet speed of the clock! No more months, its about weeks! Scary...