Radio Userland has been upgraded to support Really Simple Discovery (RSD), an XML-based protocol that enables weblog editing tools to easily find the Web services they can use to read and write a weblog.
This ought to provide a nice boost to weblog editing clients -- especially if they are designed for non-technical users. A prospective weblogger would only need to know three things to get started: his or her username, password, and weblog address.
This can get even simpler on Radio-style weblog servers. The Radio Community Server and Python Community Server will issue a new weblog address to any XML-RPC client that provides a username that isn't already taken and a password for that account (assuming the server is still allowing new accounts).