Here's a tidbit from an earlier article on the same topic:
"The goal is to replicate the success of WiFi, but with longer range.
The sub-900MHz band is an especially desirable bit of electromagnetic
real estate because of its propagation characteristics—it travels
easily through walls. Just think about the range offered by
traditional television stations; it's not uncommon for viewers 25-30
miles out from a tower to receive good-quality signals. "
And
"...the FCC has a special set of rules for the unlicensed devices.
Unlike WiFi or cordless phones, the new devices must contain a
geo-location method like GPS and must be capable of "phoning home" to
check in with an official database. That database will tell them which
frequencies are available in any given geographic area."
and finally:
"In December, the FCC laboratory will accept applications for
certification of these devices, which will be available for sale after
February of 2009."
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