XML-RPC me ASAP. This is what I was doing until 3:30 this morning: Blogger API. For starters, you can post (and publish) to Blogger via XML-RPC. There will be more to come. I'm pretty excited about it. We've had an XML-based API to Blogger forever (using our own format). It was always in the plans, but we never released it for one reason or another. Due to renewed development energy, I finally got around to making the tweaks needed to make it work like I needed it to (actually, I rebuilt most of it). Should be interesting to see what comes of it.