CC128 and MQTT as input

I've invested quite a bit already in my CurrentCost Envi, with IAM's etc and already have a system running which posts the information around via MQTT.  I am now, however, looking at running emonbase as well on a RaspberryPi .. is there any module for reading the MQTT CC128 XML into emoncms? If not, should be possible to build easily enough? I will also be looking to incorporate Nathan Chantrell's TinyTX Wireless sensors into this via the new RFM12Pi Raspberry Pi Expansion board kit ... 

Might be chewing off a bit here :)  Anyway, any thoughts? I've not really spent much time actually using emoncms, as I built my own a while back ..