I'm currently in need of a (preferably open-source) free push server, that supports both linux and windows. I need something similar to the Ajax Push Engine, but that project unfortunatelly does not work on windows (I could use a virtual machine, but that's not what I'm looking for).

I need to be able to push information to/from a python daemon, from a php script, to/from javascript and to a Blackberry application (built with java).

Is there any tool that could help me with that?

I've also looked into the Orbited project but frankly it lacks a lot of documentation and it's been very complicated to understand it. I'm not sure if it could work for me since it isn't actually a push server, but rather a proxy for it's built in MorbidQ server (or am I wrong?).

Would a technology like Advanced Message Queing Protocol work for a project like this? Something like RabbitMQ or ActiveMQ?

Thank you very much for the help.