Vicious1: It looks like you’re right and that I plugged it into the positive and negative instead of signal and negative. The positive terminal is just there in case you’re using optical endstops, right?
I’ve attached some better quality pictures taken with my SLR right now. I think the 2560 may be toast as well, since my computer and laptop both don’t even get the “You’ve plugged in a USB device” notification when I plug it in without the RAMPS shield/cape/whatever installed. What trace are you thinking of? I can’t seem to find anything that actually looks like it went bad.
John: I think the damage is more visible in this set of pictures, but it doesn’t appear to be adjacent to anything.