If you think my blog is cool... just look at this:

1. Podomatic (podcasts and videoblogging)
Caldwell's Castopia houses podcasts and embeds videos

2. Suprglu- all your blogs and stuff in one
Darren has all of his blogs in one spot: http://dkuropatwa.suprglu.com/

3. Photo slide shows
Aimee has one on her blog right now

4. Video hosting at ourmedia or at Google Video

5. Photo hosting

6. Create a wiki

7. Hyperlink to other blogs
An amazingly thorough site about blogs and blogging.

8. Create a professional blog

9. Aggregators and RSS
A visual mindmap and a guide for using RSS in the classroom.