Just found a reference on MSDN to the Windows Spaces MetaWeblog API
which may be just what I want as it explains how to use the MetaWeblog API with Live Spaces. This means I should be able to use the code James referred to in his recent post
Next question – Why do you always find the most interesting things to follow up at the end of the day?? Oh well – no prizes for guessing what I will be doing tomorrow evening.