Ok, I’ve barely finished this as a stable release, but I thought I’d post this up any way….
A little open source project I’m working on – Joe Blogs.
In a nutshell, it allows easy communication to your WordPress (or other blog) via an xml-rpc interface.
Big thanks to the work by Charles Cook at http://www.xml-rpc.net/
Joe Blogs is currently hosted on CodePlex – http://joeblogs.codeplex.com/
I’ll be posting more info, tutorials, documentation etc… in the coming days and weeks.
Update
See here for usage instructions:
http://www.alexjamesbrown.com/geek/using-joeblogs/

Thanks for creating this wrapper – real time-saver. I’m using it my VB.NET apps. Keep up the good work!
Thanks for sharing this, I really needed something!
Great ! I was looking for this!
You are the best!
Thanks for the wrapper. This was a real time saver! I had to make a minor modification to set the date_created_gmt value as opposed to the dateCreated value when posting via NewPost(). Otherwise the post showed up as ‘scheduled’ with the datetime off by a few hours.