"The current state of this interface is experimental and alpha. I’m sure something’s broken and other things will change. Your help in figuring these things out are appreciated, but no guarantees are made about reliability, robustness, or longevity. Use at your own risk."
It works through XML-RPC. The only method available right now is the making of a new post. Here’s the RSS feed to the related discussion group.
I hope someone will use this interface to hook RadioUserland into Blogger. 08/13/01 update: yes, it’s happening.