>From a totally independent point of view. We've just bounced from 1.6 to 2M4 and back to 1.6 in the last couple of weeks. Frustratingly so!
Good things about 2... updated Spring support. Bad things about 2.... Missing JMS support (only default wire format), utter lack of documentation. TBH, unless you really needed something that was in 2.x, go with 1.6. You'll find it much less frustrating in the short term. Gk.
