I went to the Microsoft Visual Studio 2010 launch event in Minneapolis yesterday and was slightly surprised by how much they were trotting out SharePoint and improved SharePoint development in Visual Studio 2010.

SharePoint is something I've largely ignored over the years as a web developer and solution architect on a small development team. I was always under the impression that SharePoint was used mostly for intranets in large corporations, and that if you were developing for SharePoint, it meant that a corporate decision had been made to use it and you as a developer probably had few (if any) options.

I realize this assumption is probably incorrect. So, what are the "cool" uses for SharePoint? What unique business problems have you solved using it? What could make a developer excited to be working on something for SharePoint?