Now that I've updated ucalgaryblogs.ca to WordPress MultiUser 2.6, the cool new native iPhone and iPod Touch blogging app will work. Just point it to your blog(s), give it login credentials, and you're off and running!
What's cool is that now all of my blogs can be managed via my iPod Touch using a native application!
For example, I used dlnorman.ucalgaryblogs.ca as the blog address, and gave it my login info. It will work with multiple blogs, too - but each blog needs to be configured separately.