Recently, I've had some comments on prior blog posts and actually got called out at the ESRI Dev Summit (thanks for making me think hard on it gang) regarding how I (or you) might build a DAL for use with a Microsoft ASP.NET MVC solution.  The main concern being that I identified some concerns that indicated we wouldn't be leveraging SubSonic 2.x in the future and that there was a desire to know what the options were.  Folks wanted to know who I was endorsing in the new DAL "election" and who might win out.