I don't know if this is something that would necessarily interest our undergraduates too much, but I love it and I think our faculty, at least, would find it useful (if they don't mind RSS feeds in general).
I'm subscribed to several feeds for blogs about cataloging, FRBR, LibraryThing, and more, but I hadn't thought about RSS feeds for journals. While looking up an article in Technical Services Quarterly, which we have access to through Informaworld, I discovered that I could subscribe to an RSS feed for that particular journal. It's not hard to unsubscribe to a feed if I don't like it, so I decided to try it, and I love it! When a new issue of the journal becomes available, I get emails corresponding to each article in that journal (as well as reviews or other things the journal contains). The emails aren't very informative - all I get is the title and author of the article, no abstracts (although this may differ from publication to publication) - but it's still better than trying to remind myself to check and see if anything new has come out and if I want to read it. Plus, this way, if there's nothing I want to read, I don't have to sit and wait for Informaworld to load - I just delete the emails and forget about it.
I haven't looked to see if other electronic journals I should be keeping up with also have RSS feeds, but I will. I'm sure Informaworld isn't the only one doing this sort of thing. It's a nifty way for professionals to keep current.
I ♥ RSS feeds.