The WordPress folks put out a new release on the Android market a few days ago. The new version seems to be working great thus far with the WordPress 3.0 install I’m running now. There’s a setting in the Settings/Writing area you need to check to enable XMLRPC to get it working initially, but it’s pretty trivial.
From what I can tell, the stats feature might only work with WordPress.com accounts (or maybe I need a plugin I don’t currently have installed to get it working). But everything else I’ve tried so far is working great. The previous release added video upload and geotagged posts. Quite a list of features and capabilities there.
If you’re on your device you can pop it up in the Marketplace using this link.