Panasonic's low-power bidirectional wireless module

Panasonic just unveiled an incredibly small low-power bidirectional wireless module, which the company hopes will speed up the development of a "ubiquitous society" (we assume they mean wireless ubiquity). The module incorporates a radio circuit and a microcomputer on a single CMOS LSI chip measuring 12×16×1.3mm —
it's apparently the world's first low-power device operating on the 400MHz band. The company plans to start using the module in the fall and foresees it being used in everything from various home appliances and entertainment products to car navigation and electronic shelf tags.