Ideas for using blogs in class

1. In AP Chemistry, students write lab reports. Maybe instead of having them all write the same thing, I'd have them create a blog, wiki, or Google Site about their research.
2. In Honors Chemistry, we study organic chemistry. This unit involves a small amount of actual content about organic chemistry and a large amount of practice in naming molecules--not really that important or interesting. Maybe I'll put in some sort of research project instead.
3. I coach the Knowledge Bowl and Quiz Bowl teams. I've always had the schedule online, but have only been able to keep up with posting results once. I'd like to create a blog to post results for students, parents, and whoever else. Maybe pictures too?
4. I take pictures at KB and QB events, but have never had a good way to share them. I'd like to use either Flickr or Picassa to make them available, and allow students to add pictures.