InnerWireless plans to support wireless access throughout the Sears Tower, even in the elevators: The company will build a network that will offer Wi-Fi networks or cellular networks throughout tenant offices if they want it. But it must first make deals with the cellular operators to extend their coverage in the building.
InnerWireless sounds a lot like RadioFrame, a Craig McCaw company that's been around for ages. RadioFrame sells a box that can be deployed in offices that users can essentially slide radios for any kind of network into. The platform can offer Wi-Fi and cellular coverage from a single device.
A few years back the Sears Tower was having trouble keeping full of tenants. This may be one effort to draw tenants in. It seems that more office buildings are making themselves Wi-Fi-ready, which may be a major selling point for companies that don't have the IT staff to build their own wireless networks.
Also, in this case, cellular coverage in the elevators is probably a bonus because the building is so huge it probably takes forever to get in and out of.