B737-700 CREW FOUND THE STATION LOAD PLANER MADE A MISTAKE IN THE ZERO FUEL WT OF THE ACFT. THE ACFT WAS 10000 LBS HEAVIER THAN SHOWN. THEY MADE NO ATTEMPT TO CONTACT THE CREW WITH THE ERROR.

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AT PUSHBACK; I NOTICED THAT THE TKOF WT APPEARED TO BE VERY LIGHT FOR A B737-700. I CHKED THE WT OF THE PAX ON THE BACK OF THE LOAD MANIFEST SHEET AND IT WAS GOOD; AND I CHKED THE MATH BTWN THE ZERO FUEL WT AND THE TOGW AND THAT WAS GOOD. I FAILED TO ADD UP THE PAX; BAGS; AND EMPTY WT TO DOUBLE CHK THE ZERO FUEL WT VALUE. THE FO ENTERED THE NUMBERS INTO THE OPC AND THE FMC. ON TKOF; THE ACFT FELT HVY AT THE COMPUTED SPDS; SO I ROTATED AND ALLOWED THE ACFT TO FLY OFF AT THE SPD IT NEEDED. THIS APPEARED TO BE ABOUT 10 KTS FASTER THAN COMPUTED. ABOVE 10000 FT; THE FO DOUBLE CHKED THE LOAD MANIFEST AND FOUND THAT THERE WAS A 10000 LB ERROR ON THE ZERO FUEL WT. I ENTERED THE CORRECT ZERO FUEL WT INTO THE FMC. THE FO RADIOED BACK TO MCI TO CHK THEIR PAPERWORK. THE COORDINATOR STATED THAT THE OPS AGENT HAD ALREADY FOUND AND CORRECTED HER MISTAKE. THE FO ASKED WHY WE WERE NOT INFORMED AND THE AGENT STATED THAT 'IT'S SOMETIMES DIFFICULT TO CONTACT ACFT ON THE GND; SO THEY DIDN'T TRY.' BOTH OF US WERE MONITORING OPS FREQ ON THE TAXI OUT AND WOULD HAVE HEARD A MESSAGE FROM OPS. WE ENTERED THE CORRECT INFO INTO THE OPC AND FOUND THAT THE PWR SETTING WAS STILL CORRECT AND THE RWY WAS MORE THAN SUFFICIENT; BUT THE VR SPD SHOULD HAVE BEEN 7 KTS FASTER. OPS NEEDS TO BE BRIEFED ON HOW IMPORTANT IT IS TO CORRECT A 10000 LB ERROR AND THAT THEY CAN CONTACT A FLT THROUGH THE TWR IF NECESSARY.