I find that I am increasingly relying on the blog as an aid while preparing lectures. I try to avoid using it as a way to present quotes and things I use directly, but I like it as a way to store links, comments and suggestions, both for my own background material and for the students who would like to have access to some of the resources I use to prepare.
I did the same thing for Blogtalk 2.0. It was received ambivalently. I had not foreseen that the net would be overloaded by the general use of so many laptops in one room, so I had to ask people to please log off. That request was received fairly gracefully, but ewwwww - felt bad. Some people were annoyed with seeing the links on the blog, some were happy. But when I had to ask people to turn off the computers, it lost a lot of the main reason for displaying the links like that. I originally wanted people to be able to call up all those links and play around with them while I was talking.
But teaching my regular students, I use the lecture blog mainly as a future reference for them and a tool of preparation for me. This lets them go back in my archives and reconstruct some of the background for my lectures, if they so wish. I also find that while the students don't react to this at first, as they become familiarised with it they use the lecture blog not only as a way to go back and check, but also as a way to see what I have in store for them in an upcoming lecture.