Experiment
Got this program called performancing for firefox and am trying it out. Let's see if it works.
Update: As near as I can figure, this software adds the post to your rss or atom feed, but only saves it as a draft on blogger. You still have to go in and edit and save. So what's the purpose? I suppose if you're at work and run across something to add to your blog, you can do it quickly and quietly. Then later log in and publish it.
Don't know if I'm inclined to use it much myself since I'm my own boss, and I'll surely not fire myself over using company time to do a blog post. Oh, well ...