I just downloaded the Microsoft Office 2008 XML converter for the Mac. This handy tool allows those of us with Office 2004 for our Macs to convert the new file formats to usable ones. Pretty nifty - and it's in the drag-and-drop style that's common to the Mac.
I've had some real success using Class Bloggmesiter (thanks Nancy!). I'll add the bookmark to our group, and I'll be happy to help anyone with setting up class blogs. Heck, if Tutka can do it, anyone can.