Offerdahl sees even bigger opportunities ahead as companies start handing out wireless palmtops and other data devices, each with its own complicated billing plan.

FORBES: Magazine Article

Their first project was to tackle one of the major causes of dissatisfaction among many of their clients, which was when they would exceed their minutes on their billing plan, they wouldn't find out about it until the next month, when they got their bill.

FORBES: Magazine Article

The City currently stores and manages some data in a cloud solution, such as the Chicago Department of Aviation's data related to airline billing and building plan information as part of the Department of Buildings' E-Plan review system.

ENGADGET: Microsoft to provide cloud services for city of Chicago in four year deal

If you overestimate your monthly needs, Zact will actually credit your account at the end of the billing cycle, in effect charging you only for the plan you should have chosen based on usage.

FORBES: Connect