According to the Register, Sonic Software is about to start an ESB project at Apache.

"ASF is next week expected to announce the ESB project, backed by a brace of software vendors and led by integration specialist Sonic Software."

Sonic Synapse comes after ObjectWeb launched the ESB initiative over 12 months ago. CodeHaus already has an ESB project (ServiceMix). JBoss also plans to start an ESB soon.