The Weblog Tools site has a link to an AIR application aimed at blog authors, its called AirPress. AirPress seems to offer similar functionality to other blogging tools I have seen such as the ScribeFire add-on (used to be called Performancing) for FireFox. The major interesting addition in AirPress is the inclusion of webcam support to allow authors to publish FLV formatted video to there WordPress blog. AirPress still seems to be in an early stage (betr) but could be worth keeping an eye on.
Rather amusingly “AirPress requires Adobe AIR beta (Download Adobe AIR)”. Thats a Beta that needs a Beta to run. Beta2