Mule 1.1, ESB messaging framework, released
Mule is another open-source ESB along the lines of ServiceMix. I started looking around ServiceMix a few weeks ago. I think the thing that strikes me is the lack of tooling for these offerings. I am not a huge GUI fan, I tend to lean more toward the command line and simple text editors. However, given the somewhat complex nature of integration work especially when asynch messaging, and complex transformations/enrichment are involved; I think tooling becomes extremely important. Before these frameworks become any kind of serious player, they will have to evolve a lot. They probably will not need the kind of tool sets available from the pure play vendors but something more than what is there will be needed for more mainstream adoption.