If this works, I'll detail out how to set it up.
Very cool... they got .Text working last night apparently.
Go into "Add a Blog", for the web address, type http://geekswithblogs.net/ and then enter your login and password.
Press "Find My Blog"
It wll come back saying it can't find it, and now has a dropdown for "Blogging software" with "Custom" selected, and a textbox for "Web service endpoint".
Using the information for Windows Live Writer from Julian on the geekswithblogs site, enter:
http://www.geekswithblogs.net/<YOUR_BLOG_NAME>/services/metablogapi.aspx
and press "Find My Blog" again, and it's ready to go!
It will post with no Category checked, but that's a minor thing to change when you're next able to do so.