Any luck with it?. I have no idea how the data stream looks like but... does it look like having LZH or any other kind of compression?. Have you tried looking for regular structures within the stream (using bit granularity)?. I have a Minimed Pump and did an experiment once trying to crack the carelink applet to get the data stream using the USB dongle. Too much work and too little time :-P.
I've been working with Andy on this project. I've created a little python script to help get the ball rolling. Let's get this problem solved.
It looks like there is no compression, just a bunch of ints.
FWIW, we've solved the problem of actually talking to the pump, now we just need to decode the data!