I found this Support home page for IIS 6.0 really useful.

It lists the most recently released KB articles; and categorises them into 3 sections:

How To's
Fixes
Troubleshooting guides

It also links off to the Solution centre and contains links to further RSS feeds.

Generally a pretty good place to bookmark if you deal with IIS.

http://support.microsoft.com/?scid=ph;en-us;2097