I thought of something like this for mOlympics a few days ago, but had forgotten about it. Seeing how the RSS Calendar guys did it made me realize how simple it is to do, so I once again, copy/pasted the basic query page, slapped some document.write('') lines in there and *poof* I have a web-service! Unlike RSS Calendar, though, I didn't use tables, but just the XHTMLized divs I already had hanging around.
To put mOlympic headlines on your site, include the following code:
Yeah, I know the style stuff is a bit verbose, but it's also a lot more flexible/powerful. You can put the banner anywhere you want. And if you want to just have headlines about a specific topic, just put a search param in the url like this: "banner.jsp?q=archery".
I'm going to add it to my site right now, if you're reading this in an aggregator, come check it out!