http://www.usacycling.org/news/user/story.php?id=1351

Disk brakes are not allowed in UCI events other than mountain bike events. While last year this was an interpretation of the UCI given that disk brakes had never been approved for any races, this year it has been clearly written into the UCI rules that disk brakes are not allowed. Thus, if you are riding cyclocross, you may use disk brakes only if the race is USCF only. For any event on the UCI calendar, if you are in the Elite Men, Elite Women, U23 Men, or Junior Men, and these races were put on the calendar, then you cannot use disk brakes. If the organizer has also included masters events or events for category 3 riders, or juniors below 17 years old, then disk brakes will be allowed.

Be advised that as of January 1st, 2007, UCI rules for bicycles will take effect in all USCF races, so unless the UCI rules change, disk brakes will then not be allowed in any races other than mountain bike.

Stupid is'nt it?

This stinks from an advancement of the bicycle standpoint. My commuting and family bike is a flatbar roadie that I guess could easily be a cyclocross bike with a few mods. 700c wheels and cantis is what I am saying here but IMO for family use, specifically the hauling of trailers and trailerbikes disc brakes are a big plus. Unfortunatly bike companies don't make bikes for this purpose and to piece one together you need parts from other similar bikes. Cyclocross would almost have to be the first to get discs on a 700c wheel and now that it is illegal the few parts that we have will for sure be about all there will be. If they were legal I would hold hope for additional forks and maybe a road frame other than the Specialized (of course someone will reply with 3 or 4 others for me) Sirrus Disc frames.