BloggerCon looks like it will be interesting. I see Dave is looking for ideas for the second (October 5) BOF day. One BOF that I would like to see is on Blogging-related Apps. There's a lot of attention to protocols and formats, there are commercial products (generally server-side) to create and author blogs, but the question of what software people use to read Blogs.
There are a bunch of toy and quasi-toy and a few good blog readers out there but there's lots of room for innovation. Let's get some folks together who are interested in that!