Posterous is a great web app: they've managed to the keep it simple and elegant to use while making it ever more sophisticated (thanks in large part to Garry Tan's leadership).
They're also very quick to respond to questions from users:
Why did I need such a script? My oldest domain, cyberclip.com, was registered in 1995 (back when "cyber" was cool! ;-) and went through early years of excitement and later years of neglect. A few months ago I streamlined it to a very simple design:
Recently I thought it would be nice to add just a little more content and decided to include a list of the newest posts from all my blogs. Since Posterous doesn't supply a consolidated feed, here's the ruby script I wrote to generate one. I've only tested it with FeedBurner and Posterous but it should work with all properly formatted RSS feeds.
I've purposely kept error handling out of this script for simplicity's sake because that's handled by the program that invokes it. That prog runs as a cron job and regens the homepage on a regular basis. It won't replace the homepage if RSSFusion errors out for whatever reason. So worst case is a stale homepage, not a broken one.
Combining blog posts for inclusion in another page is one use, but this script could also be used to generate a fused RSS feed of multiple blogs, which is something I should probably add to my homepage as well...