I'm back to using Opera for now. I have been unable to get the Flash plug-ins to work under Firefox 1.5, and it's amazing how many sites I visit that use Flash. I never notices, until it didn't work. Also, some of the plug-ins, like the spell checker, don't seem to be working either. At least with Opera, I can check my spelling (and I need that).
I have subscribed a bunch of our blogs to a tagging service, and placed the resulting cloud on the main blog page. This should give us another way to index/find content. The service takes a bit of time, and it has it limits (I was not able to add everyones blog since there seems to be an undocumented limit to the number of feeds you can add.) If it looks like something that is helpful, we'll look at implementing a local service. That should make it faster, and keep it under our own control
I was having trouble with one of my other blogs. I wanted to update it to the latest version of Wordpress, and the update instructions simply say “Delete your old WP files, saving ones you've modified”. But for some reason, I couldn't delete some of the old files. Several files were locked by another user (in my account?), and I didn't have permission to delete them. So Clinton suggested I write a script and see what kind of permission that ran with. So in about 2 lines of PHP, I managed to delete the whole lot! I guess it's called security 
But the upgrade is done and seems to be working fine. I'm keeping an eye on the Wordpress.mu project and think we may move these blogs to wpmu when it matures a bit more.