I was about half way through writing up a long winded post about choosing a data access provider for use in ASP.NET MVC projects, when somebody tweeted the URL to this excellent post.  I'd fielded several "what should I use" questions at the dev summit last week and was nearly done with my promised response when I got scooped. Definitely check it out...I'll save my comments to the drafts folder in advance of a more careful read-through  tonight.  But the noted post covers all the bases pretty well.