The upgrade is pretty simple but can't be done through monkey (yet). The MIDIOX process is really straight forward (just follow the instructions) and make sure that the MIDI
OUT plug on the UNO goes into the MIDI IN on the M13 and vice versa on the other plug. This has been a major source of frustration for other users as it (as you can guess) causes the upload to stall/fail.
I thought that the 40$ price from GC for the UNO USB/MIDI cable was a little steep, so I bought a 10$ (shipped) USB/MIDI cable on EBAY.
It worked flawlessly. I didn't even have to install any software for it. From start to finish it took all of 20 minutes!
here's the link to the auction I won:
http://cgi.ebay.com/ws/eBayISAPI.dll...ht_2196wt_1165
I'm not plugging the seller - it just seemed to work out pretty dang good. He is close to my location so I ordered it Friday morning and got it on Saturday!