I've downloaded the trial version of hblogger - a blogging tool for PalmOS. [Posted with hblogger 2.0 http://www.hexlet.com/]
It's ok, but I'm not terribly impressed. I had to add the title of this post after the fact. Additionally, while I can save drafts on my handheld, it doesn't allow me to post them to blogger as drafts -- I often rework my posts a few times before I actually make it public. I've got two or three in the queue now.