IONA is offering some public trainings for both Apache ActiveMQ and Apache ServiceMix. The following dates are the first two:
London,UK - March 11-14
Waltham, MA - March 17-20
There's even a pricing break by signing up for both classes. For information, see the Public Training page on the Open.IONA website.
IONA utilizes the products from its FUSE line of products that are based on Apache products for these trainings. But everything from the training transfers without issue to the Apache versions as well.