Having rooted my eDGe using the "Android Universal Rooting" app this morning, I had to wait until I got home to see if I had successfully enabled adb so that I could debug on the eDGe instead on in the emulator.
I have now run up eclipse and it recognises my eDGe and has installed all of my apps onto it (I had to uninstall them first as they were installed from signed apk before - that's normal and I had to do the same on my phone).
So the result is : on device debugging and adb now work on my eDGe
thanks go to robot as he is the one who found out how to enable adb.
andy.