Apple has released iWeb 3.0.2 (http://support.apple.com/kb/DL1104). According to Apple, this update refines comment and search support for blogs and podcasts published to MobileMe.
It also resolves some issues related to publishing sites to MobileMe. It’s a 177.14MB download and requires Mac OS X 10.5.6 or later. You can obtain iWeb 3.0.2 via the Software Update component of Mac OS X’s Systems Preferences app.