The August 2014 Release (build 18.104.22.1682) is live: http://mfcmapi.codeplex.com.
It’s been a chaotic half year and I haven’t been able to get my builds out as often as I’d like, though I did do a ton of work on MFCMAPI.
This month we get a totally rebuilt MAPI property parsing engine. As it’s an engine change, you shouldn’t notice much different in MFCMAPI itself, but all of my XML exports get an upgrade.
Here's a change list - see the Issue Tracker and ChangeSets on Codeplex for more details: