I asked this over in Yahoo! services and they said I might get a better answer here:

I'm over at Flickr (also Yahoo! owned) and none of the choices for blogging are Yahoo! 360. I assume this is because 360 uses some other sort of blogging software. And, while I'm adding, what about MySpace blogs? I don't really want to start another blog just to blog Flickr stuff, but I've been getting more into Flickr recently. I've got a tech blog at http://douglasawh.wordpress.co… but that's primarily just to keep notes for work and I don't want to put Flickr stuff on it.

While over at the other question, I was give this link: http://news.yahoo.com/s/nm/blogs_business_dc. It's not very helpful to answering the question, but an interesting article regarding blogging.

Thanks!
to the question about getting the domain:

This isn't an important issue to me. I just wanted to see how the automatic blogging from Flickr worked. I think I might have set up a LiveJournal at some point and never used it. I'm not sure. I could very easily set up another wordpress blog at wordpress.com since I'm familiar with them, but I see no need.

It's unfortunate that Yahoo! doesn't do a better job of intergrating its services.

Yahoo and Myspace use their own system which means the code was made by themselves.

Why dont you get a domain and install a wordpress in it?
Then you can have thousand of plugins,flickr for example for your blog.