For cross, I always figured the entry would be people setting up on the front wheel as a disk and leaving the back as a canti. That way people with current frames would only have to buy a new fork / new front wheel, and they'd get the benefit of greater braking where it matters and eliminate brake shudder. This may be a stupid question, but is the front wheel also 130 or 135mm? For some reason I thought it was narrower (and now I'm gonna have to go downstairs and measure it, damn.)