For the archives, an update.

I emailed Jagwire, their response was (paraphrased):

"The units were modified mid-season to be mountain specific and have single ended wires. The derailler kit is fully compatible with your ultegra shifters and the brake kit would need the wires replaced with Shimano road brake cables"

They suggested jagwire p/n 92TC1700 (teflon coated) or 92BC1700 (galvanized) would work, and also pointed out that the brake cables are extremely stiff, and would probably need extra taping to keep them under the bar wrap.

There ya go, for those searching for colored road cables!