Checked out some blogs on my friend Sandhya Jain's Blackberry 7100 cell phone yesterday. Loads at old 28.8 speeds, and breaks down the pages into a single little column. Nice color display.
Blogs with tons of links in left margin (Nick Piombino and Ron Silliman) don’t work well because you have to scroll through the links to get to the body text. The Jim Side comics were too small to read.
Jordan faired best -- fast load in and minimal link clutter to thumb scroll past -- not bad.
You could easily blog on this phone, which actually looks like a phone.