GMail has added Web Clips at the top of their page, showing RSS and Atom feeds plus “relevant sponsored links” to the top of your messages. Unfortunately, it looks like only the sponsored links are actually relevant (which I read to mean “related to the message you’re reading”). Clips from your own RSS feeds are still just random.
Hopefully they’re busy working on fixing that — I still think automatic annotation of email (and blog entries) with other related entries form a largish set of favorite RSS feeds is a seriously useful application that needs to be exploited. Honestly, I’ve been expecting it to be just around the corner for about three years now, and I’m not sure why I’m still waiting. (I know, I know… if I really want it done I’d sit down and write one myself…)