I stumbled across some nice features I could use for www.gnowsis.com.

Features like Samsung contact. They are also on Freshmeat.

This leads to the question: Is it feasible to implement an Open Source MAPI interface? By doing this, we could fool Outlook into storing its information on a RDF store, perhaps server based.
otlkcon tries to do it.

Bynari Insight Connector is the "bring two good ideas together" approach. It uses an IMAP server as a storage device to host MS-Outlook data. That is plain GREAT. It implements MAPI and fools Outlook into storing all its data into Bynari. Bynari then forwards everything to IMAP. Don't wanna know what tweaks they did on the IMAP side, anyhow.