If you look at some of the videos on OpenTransactions, FellowT mentions that different encryption methods can be used for messaging and Bitmessage is one being used, at least that is my understanding, so is this thread a discussion solely about Bitmessage and its future, or its use within OT? Its a thread that was started in May 2013, and a lot has happened since.

Pretty much everything about OpenBazaar is a carbon copy of OpenTransaction, One Works through browser, the other a desktop client