Hi, We have republished and updated a quick migration guide from BlazeDS to GraniteDS on our blog here: http://www.granitedataservices.com/2014/03/18/migrating-from-blazeds-to-graniteds/
AFAIK, BlazeDS is dead for about 3 years, as well as Spring-Flex. On the other hand, GraniteDS is still very active and supports all new Spring / Java EE technologies. Just a quick reminder ;) Franck.
