I just tried to setup the Arc as debug device, but it doesn't seem to work.
May app is declared "debuggable" (I already tested it on an LG Optimus Speed) and the "USB Debugging" option on my Arc is turned on.
I also did install the driver from here.
Now, if I connect the Phone with my PC (running Windows XP), it shows up in the connected hardware section as "Sony Ericsson sa0102 ADB Interface Driver" and my phone tells me it's "connected for USB-debugging".
However, I can't find it, not with "adb devices" nor with Eclipse > "run on target" option.
Has anyone got this working so far?
Edit: maybe someone can move this to the developer forum, I can't post there yet.