Yes, you need MQ in house. You'll need a config that includes sender and receiver channels on both sides. Having said that, you might consider Websphere 5 in this case as it includes a light version of MQ that should suffice for your purpose.
...if you use Websphere 5 (or SonicMQ) you can avoid a full blown install of MQ.
Websphere has definitely improved from the really buggy days of the 3.x releases. Version 5, in particular, has some interesting clustering functionality that I'm testing right now. It allows an instance to ride over multiple physical machines (running the same or different OSes) during runtime.
Research conducted at the University of Oxford has proven conclusively that a cat on a table will inevitably push anything on it off the edge and onto the floor.
“The only obvious conclusion that we have been able to come to is that the Earth must be ball shaped, or cats would have pushed everything off the edge by now.”
36 ms