One of the most common things I see on the SubSonic forums is people asking about the Membership and Role providers running SubSonic. And another common thing I see are people saying they are going to write those providers... but it doesn't happen. So, I did it :) I started writing the Membership and Role providers a few days ago... and I finally finished coding the providers today. And I'm ready to publish!
I chose to do this project on Google Code (http://code.google.com/p/subsonicproviders/).
So I am announcing Beta 1! The providers should just work (requires a little config). I think we should incorporate some feedback from the SubSonic user-base before calling it "Version 1".
The one thing I am EXTREAMLY proud of is that we are going to ALWAYS put out the code in C# AND VB. I am a VB dev at heart that is starting to fall in love with C#! (I'm taking the BIG step in developing the SubSonic ASP.NET providers in C#!)
(Send me an email at firstname.lastname@example.org if you would like to contribute. SubSonic guys would be a plus :) )