The June 2008 Release (build 126.96.36.1996) is live: http://www.codeplex.com/MFCMAPI
I've been digging through the protocol docs. This update represents my first pass harvesting the easy stuff, like property names and flag values. I definitely plan to get to the more complex stuff, like recurrence blobs. Some of the work done here was putting in plumbing to make that possible, like consolidating all of the property parsing code into one code path. I've also introduced Smart View, which replaces the Flag column, allowing MFCMAPI to parse more kinds of data automatically. Expect to see this feature expanded greatly as I work my way through the protocol documentation.
Here's the change list - see the Issue Tracker on Codeplex for more details, or look at the code: