One small change I made to the Science Museum homepage over the last week was to add a link to our new RSS feed. We're linking directly to the feedburner version of the feed, which basically contains all the current homepage promo content.
I documented the change over on our 'dev' blog, so I'll try not to repeat myself too much here.
It was nice though to be able to quickly demonstrate the addition internally and then send it live - lots of the things I'm working on at the moment are still deep in development.
Also worth mentioning that so far, most of the subscribers seem to be using Google Desktop, for some unfathomable reason.
The feed itself needs tweaking - the embedded html links are currently converted to plain text. But it's a good start, and I hope to be able to push RSS feeds more in future...