Check out this interesting presentation on InfoQ by Cesare Pautasso.
We at Atomikos are working with Cesare to research REST and Transactions and how to integrate this with BPM for REST as well; check out this slideshare presentation (also by Cesare).
Review: Going from Architect to Architecting: the Evolution of a Key Role
4 Microservice Myths and How to Avoid Them
High performance JMS processing with XA
Transactions for the REST of us
Transactions for SOA