Since I'm planning to talk about the Provider Model in ASP.NET 2.0 at several user groups this month (including Richmond .net tonight, Maryland ColdFusion User Group on the 14th, Capital Area .net UG on the 28th, and BaltoMSDN on March 15th), I wanted to remind folks about the ASP.NET 2.0 Provider Toolkit. It has documentation and downloadable samples that will help you create your own custom providers. Very cool.
Also very cool is the fact that Stefan Schackow, one of the many big-brains on the ASP.NET team, has released a new book on Security, Membership, and Role Management in ASP.NET 2.0. Stefan helped me out quite a bit when I was trying to dig into making the Active Directory membership provider work in beta 2 (when it still wasn't documented) so I know from first-hand experience that he really knows his stuff.