To better manage the growing content on Labs there have been some changes to it's RSS feeds.
The one RSS feed we had (http://labs.blackbaud.com/rss.xml) has being replaced with multiple new feeds, and since Labs now runs on NetCommunity, the feeds have different URLs. The old feed will get one more post with links to the new feeds. They are:
By the way, one cool new feature in BBNC 5.5 is that feeds/posts can contain categories so the sorting and filtering of feeds in IE 7 and other browsers kicks in nicely.