EE Times has a good description of how AirFlow's WLAN switch platform works: AirFlow's solution attempts to avoid interference issues by stripping the MAC layer from the APs (access points) and centralizing a single MAC at a centralized controller. That means all the APs can be tuned to the same channel and clients communicate just with the MAC at the switch. AirFlow describes the setup as one AP--the centralized controller--with multiple antennas.
It's a sound concept, especially for enterprises that might want to enable voice over the WLAN. Because clients associate with the MAC at the controller, they don't have to re-associate each time they move from one AP to the next. That eliminates some of the problems with current generation WLANs which can't quite hand off from one AP to the next fast enough to support voice.
The downside is that the offering sounds super proprietary, so it could potentially be tough for AirFlow to comply with AP standardization efforts underway in the WLAN switch market.