There's my AMQP client, which works with (at least) RabbitMQ:
http://www.squeaksource.com/AMQP.html. It's not JMS, but AMQP was heavily
influenced by JMS, so it will in all likelihood cover your needs.

Regards,
  Tony


John Chludzinski wrote:
> Is anyone aware of a simple JMS client implementation in Squeak (or any
> Smalltalk)?  ---John
> 
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