We currently have an early adopter program which includes several household names who have been using JBM in production for some time.
We also have many other non production support customer using JBM and many more again non paying customers using JBM in production.
Currently only developer assist support is available for JBM (apart from our early adopters), but JBM is scheduled to be the default JMS provider in the new JBoss Enterprise Application Platform 4.3, and the brand new JBoss Service Integration Platform which are both due out this December, at which point the highest level of production support will be generally available.
This is a very good news. What about performance? Can Jboss Messaging easily handle 500K messages in 8 hours (with message payload between 2KB and 2MB)?
Exact figures depend very much on the hardware being used, and if using persistent messages the type and tuning of the database being used for persistent messages.
Having said that 500K msgs in 8 hours doesn't seem that much.