I’ve played with several client tools for blog posting, as it is not always practical to post straight into a web page (when I’m flying or underground on the Tube for example).
Anyway – all the things I have played with, which have been a mix of Mac OS X Widgets and straightforward client apps have been pretty poor or very unreliable.
I’m now trying out MarsEdit, a Mac shareware app, and so far it’s pretty good. It’s WordPress friendly, which will work well when we’ve moved the IT PRO blogs over, and it seems to mirror all the important features. But the best bits are the Flickr integration and the simplified process or adding images, movies and other downloadable assets.