SharePoint 2007 will not only change the way you develop applications for SharePoint, but it will also change the way ASP.NET applications are developed in general. If you doubt that, consider that its predecessor, SharePoint 2003, introduced (among other features) the Web Part technology that was later incorporated into ASP.NET 2.0.

One indication of how this new version dramatically expands SharePoint's already extensive feature set is to note that the number of namespaces in the WSS object library has increased by almost a factor of Three (13 namespaces in WSS 2.0 vs. 36 in WSS 3.0!) This article is just a sampler, covering 5 of the new or enhanced features that every SharePoint develop should know about - features that you will want to master to fully benefit from SharePoint 2007.