This is a shame - a delay in the GOCE, Gravity field and steady-state Ocean Circulation Explorer, mission. This is following on from the GRACE, Gravity Recovery and Climate Experiment, mission. Unlike GRACE, which was a twin satellite system, GOCE is stand-alone, but has some mighty impressive stats including precision accelerometers that sense accelerations as small as 1 part in 10,000,000,000,000 of the gravity experienced on Earth. That's amazing.
Missions such as this provide us with a wealth of information about our gravity field (and a darned good geoid), but as you can read in the BBC article there is lots more that can be gleaned from it.