Exposing XI JMS Queue to external applications

All:

The XI Adapter framework provides JMS Adapter with capabiltiy to publish and subscribe JMS Messages with external queues.

But, the question is, could we expose a JMS Queue from XI so that external applications can use JMS Client to publish/subscribe into the XI JMS Queue?

XI has its own queue implementation. But, it does not seem to be JMS compliant, but SAP's own proprietary queue implementation.

Bottom line, if I want to use XI as an integration middleware, we need the capability of exposing Queues to external systems to do pub/sub.

Thanks and appreciate your comments.