MDT CREW WAS CLRED FOR IMMEDIATE TKOF BEFORE THE B727 AHEAD OF THEM WAS AIRBORNE.

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I WAS THE CAPT AND PNF ON SCHEDULED FLT TO SBN FROM CVG. MY FO WAS THE PF. WE WERE CLRED TO 'POS AND HOLD' ON RWY 27 FOLLOWING A B727 ON TKOF ROLL. TFC WAS LNDG RWY 36L (INTERSECTING 27). PRIOR TO THE B727 LIFTOFF; TWR CLRED US TO TAKE OFF 'NO DELAY; TFC ON 2 1/2 MI FINAL.' WE COMPLETED OUR LINE-UP CHKLIST AND ROLLED IMMEDIATELY. MY FO COMMENTED THAT THE B727 WAS NOT OFF THE GND YET. I SAID HE'S ROTATING AND WE CONTINUED OUR TKOF ROLL. DURING OUR GND RUN; WE PRACTICED STANDARD COMPANY CALLOUTS. NORMAL LIFTOFF AND DEP ENSUED. TWR DIRECTED THE TFC LNDG RWY 36L TO GO AROUND MID WAY THROUGH OUR ROLL. SHORTLY AFTER DEP; THE TWR CTLR SENT US OVER TO DEP CTL; BUT ALSO COMMENTED 'I GUESS YOU DIDN'T HEAR ME CANCEL YOUR TKOF CLRNC.' I REPLIED THAT WE CERTAINLY HAD NOT. DEPS AND ARRS WERE NUMEROUS DURING THIS TIME. I BELIEVE WE SHOULD NOT HAVE BEEN CLRED TO GO UNTIL AFTER THE CONFLICTING TFC HAD LANDED. IMMEDIATELY AFTER TKOF CLRNC IS ISSUED; INTRACOCKPIT COM IS EXTENSIVE AND IMPORTANT. PLTS ARE CONCENTRATING PRIMARILY ON MEETING TKOF CRITERIA SAFETY. IF IT WAS CRITICAL TO HAVE US DISCONTINUE TKOF; THE CTLR SHOULD HAVE REPEATEDLY ISSUED HIS INSTRUCTION TO CANCEL CLRNC OR POSSIBLY CALL FOR AN ABORT. I BELIEVE IT WAS INCUMBENT ON THE CTLR TO MAKE SURE WE HEARD HIS CALL.