strixy, I've been playing a bit with the Blogger API today.. I'd heartily recommend Python for simplifying the whole XML-RPC thing (which I am just beginning to understand
Make sure you get an API key from the Blogger developer site and you're pretty much set to go.
Python has a standard library called xmlrpclib that'll handle the dirty specifics of XML-RPC calls for you. Here's a couple of examples..
server = xmlrpclib.Server("http://plant.blogger.com/api/RPC2")
.. will create a connection to Blogger's XML-RPC server
appkey = *whatever your API key is*
username = "wolveso"
password = "password"
blogList = server.blogger.getUsersBlogs(appkey, username, password)
.. will retrieve some information about all your blogs
I'm trying to do something similar to you myself, mainly just to get to know things better. I guess I'll have to learn GUI things a bit later