Well, well. From BBC online…

Microsoft’s next version of its browser, Internet Explorer 7, will make it easier for people to keep automatically aware of website updates.
IE7 will have an orange button on the toolbar which will light up when it detects a Really Simple Syndication (RSS) feed on a site.
Users can click on a “plus” button to subscribe to the site’s feed, as they would with a bookmark.

What’s funny about this? Nothing. It’s just that I’m using Safari (the browser that comes with Mac OS X) and it has exactly this feature built in. Now.

.

Still, full marks for effort to Redmond.