Intel made a presentation of reconfigurable radio architecture to a forum in the Valley:
The processors are not bused, but rather are connected through a mesh that emphasizes nearest-neighbor relationships. This both offers a natural implementation for data flow organizations and reduces the power and signal integrity issues that come with long interconnect lines.
The mesh of processors is terminated on two sides by an array of I/O engines, with one array serving as an input device and the other serving as output. In front of the input processors resides a switchable array of analog front-ends — and, presumably, antennas — allowing the entire system to hop gracefully between frequency bands. Different analog front-ends provide different pre-filtering and signal capture/conversion. Behind the output array lives a collection of various media-access controller (MAC) devices.
Very cool. Expensive and complicated, but cool.