radioclient is a PythonCard application for interacting with a Radio Userland 8 server via the Blogger API (XML-RPC). If you are planning to look at the sample, you should also read this mailing list post about radioclient.
And yes I added and edited this post using RadioClient :)
Hmm, looks like a further edit in Radio was necessary to get the date URL to work?!
It would be easy to modify this app to talk to blogspot or manilasites (via the blogger API), or any other site that uses the blogger API and I may do that in the future unless somebody else beats me to it.