Just think about it for a minute: People make summer vacation plans months in advance.

FORBES: Don't Cut The Gas Tax For Summer Holidays, Double It

And it's not difficult to imagine the business-to-business uses of e-scheduling, like letting distributors arrange for manufacturers' deliveries at convenient times or allowing customers to book product-training classes online, or even enabling an administrative assistant to make plans for a temp to cover his weeklong vacation.

CNN: Analysis: Brace yourself for the e-scheduling revolution