It is, to my understanding, a Performance Bikes exclusive, and over at the Road forum, that's not exactly loved. Guess this place is more accepting.
Hmm... my canti's have one wire coming down that hooks into a second wire that connects the two main pieces. Direct-pull?
Anyway, I'm heading to the bike co-op this evening anyway, so I'll see what they say. The fork is actually slightly different from the one on the Roubaix (has "Cross" in the name), so who knows.