Sorry it's a day late, but here it is:
Kevin DeRudder points out that Audiences aren't just for WebParts, but for QuickLaunch links too – check it out here.
Willie Rust has posted a good article on using a SharePoint list as an authentication provider.
An interesting article from Tony Bierman of SharePoint Solutions on team development for SharePoint can be found here. This article also points to an MSDN article on the same subject.
Mark Harrison point us to an extremely useful tool from Carsten Keutmann - the SharePoint Manager. The amount of times I've written a little console app to change a property on one object - this should ease the pain significantly.
Ishai Sagi pointed me to a blog posting by Meron Fridman who has extended the CQWP in a cool way - check it out here.
Interesting post from Joel Oleson on why he doesn't recommend an in place upgrade can be found here.
I've just seen this - a must read about a bug in MOSS. Apparently MS are working on a fix.