Kenneth did some academic paper research and found that our EE column = Energy Expenditure which he thought was the crude calorie calculation on the device.
I've plotted EE for an ~12 hr period in the top half of the graph above, and in the lower half is the calorie graph from the GoWearFit web service. I'd say Kenneth is right!
The web service obviously does slightly different processing. I'm also not sure of the units for EE - the values range from ~113 - 1050, whereas the calorie chart range from ~1.5 - 7.5 calories-per-minute. Maybe it is just a divide-by-100 and the more sophisticated web service processing is simply that much more accurate, but I'm not sure. A summation over EE/100 gives a much larger calorie count than the web service.