I've just started playing with Windows Live Writer ( http://windowslivewriter.spaces.live.com/ ) and have a few issues, mainly with pulling down categories using the metaWeblog API it just get an error:
The response to the metaWeblog.getCategories method received from the weblog server was invalid.
Using the WordPress API I can see only one category. This is using 1.8.1-RC, how finished is support and which API is the most supported in b2evo at the moment?