"Even though the dust hasn't settled around an exact definition
of an enterprise service bus (ESB), there are several open source
efforts forging ahead. Most recently, the ObjectWeb consortium
released Milestone 1 of Celtix, an open source ESB sponsored by
Iona Technologies. At the same time, ObjectWeb and Iona announced
cooperation between Celtix and ServiceMix, an open source ESB
supported by LogicBlaze Inc., a provider of open source integration
technology and services.
"Iona and ObjectWeb launched the Celtix project in June.
'Milestone 1 is a top-to-bottom demonstration of Web services and
APIs,' said Carl Trieloff, director of product management at Iona.
'When we get to Milestone 2, you should be able to start having
more ESB-type interactions.' He said the project intends to release
milestones about every four weeks..."