I find it kind of funny that the MSBlaster creator(s) were dumb enough to direct their DDOS attack at a site that is just a redirector. I mean, who would have thought that Microsoft would just turn off the redirection? That's funny stuff.
So, it would turn out that the Windows Update site will likely not be affected by this stupid worm as Windows actually takes you to http://windowsupdate.microsoft.com instead of http://windowsupdate.com. More info on eWeek.
Note: I'm not saying Microsoft is smart, I'm simply saying the MSBlaster creators are not smart. =)