RSS for SharePoint
Dan Larson just published his RSS plugin for SharePoint. Dan has done some awesome work on his own, as well as contract for us at Microsoft Consulting Services. He has a great web site at portalbuilder.org that has some cool tools and framework that leverages the SPS object model.
He is currently working for newsgator.com but still does a lot of independent development and puts most of his stuff up on gotdotnet.