I have been looking in to your project and have a question or two.
Do you have any plans to expand it to include AF data acccess via PI System OLEDB provider?
Did you ever do any performance measurements? Why I ask this is I like the approach of Linq to PI data access but for an application that needs heavy manipulation of data does LinqToPI come with overhead that affects performance? (e.g. As opposed to using Stored Procedures)
I missed your vCampus presentation so you may well have answered similar questions already.