AN A319 FLT CREW GOT ECAM MESSAGE THAT ONE BRAKE WAS HOT AS THEY TAXIED INTO POSITION AT DEN FOR TAKEOFF. CAPT CHOSE TO IGNORE THE MESSAGE AND TAKE OFF WITH NO DELAY FOR BRAKE COOLING.

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WE WERE DELAYED FOR TKOF DUE TO ATC FLOW CTL. WE WERE RELEASED AND TOLD TO POS AND HOLD RWY 3 AND THEN CLRED FOR TKOF. THE BRAKE WAS ALREADY RELEASED AND THE TEMP ON THE #3 BRAKE WENT TO 305 DEGS. WE GOT THE ECAM THAT STATED DELAY TKOF UNTIL BELOW 300 DEGS. SINCE WE WERE CLRED FOR TKOF AND THE BRAKE HAD ALREADY BEEN RELEASED; I QUICKLY ASKED THE FO HIS OPINION AND THEN I MADE THE DECISION TO CONTINUE THE TKOF. TKOF PWR HAD NOT YET BEEN APPLIED. MY REASONING WAS THAT THIS WAS THE ONLY BRAKE ABOVE 300 DEGS AND THE OTHER BRAKE WAS ON THE SAME SIDE WAS ABOUT 40 DEGS LESS AND THE L SIDE BRAKES WERE MUCH COOLER. I DID NOT THINK WITH THE OTHER BRAKES BELOW 300 DEGS THE STOPPING CAPABILITY OF THE ACFT WOULD BE DOWNGRADED. AND IT WOULD BE EASIER TO COOL THE BRAKE WITH THE GEAR DOWN INFLT THAN TO WAIT IN DENVER ON A HOT DAY. TKOF WAS UNEVENTFUL AND THE BRAKE COOLED QUICKLY ONCE AIRBORNE WITH THE GEAR DOWN. LOOKING BACK ON THIS; I BELIEVE I SHOULD HAVE PULLED OFF THE RWY AND JUST WAITED IN DENVER FOR THE BRAKE TO COOL.