I’ve been trying to load the firmware on the nano for a while, but it simply does not show itself as a USB device for me… 
I’ve tried it on a macbook (W7pro x64 and snow leo) and on a compaq notebook with WXP pro, and the device simply does not register… The screen on the DSO does show “USB” instead of the battery, but DfuSe shows nothing, either…
I’ve also tried holding Down while turning it on. The “Please connect to USB Host” screen appears, but plugging the USB cable yields nothing…
So, any guesses? My DSO is from the first batch, from last year…
Thx,