Ray Kampmeier (undergraduate EECS student at UMN) and I are working on a robust and complete solution for working with Digi's Xbee modules and Max.

Working with 2.5 Series radios, the present pre-alpha version allows for sending remote messages to a remote-wireless xbee (configured as AT Router/Endpoint) and local-USB-connected xbee  (configured as API coordinator).  

My XBee Playground Blog shows a record of our progress, while this post includes links to the necessary Max patches and XBee profiles.  

More coming soon.....