Thanks for the suggestions! I met with the guy doing the work yesterday -- the frame has been stripped and the "offending" braze ons removed. It looks pretty sleek.

Anyway, we stared at it for a while and decided to drill a hole into the underside of the down tube near the head tube. I'll snake the wire in there, and I'll pass it into the bottom bracket shell and out the vent hole at the bottom of the shell. We checked, and my bottom bracket will provide enough clearance for the wires.

For the forks, he's going to slightly expand both the vent hole at the top and bottom of the fork blades. It will be tricky, but that will give me enough room to snake the wires inside the fork and still leave a little opening for venting.