Belkin will use Airgo's MIMO technology for consumer products, News.com reports: The multiple-in, multiple-out technology that Airgo is bringing to market has other manufacturers signed on, but Belkin is the first well-known, mass-market brand name planning--reportedly--to sell Airgo-based equipment. The gateway will be $179 and the client card $129; they will be available in mid-October.
Airgo's equipment supports 802.11g, and its own faster, further proprietary technology. Airgo claims a fourfold increase in throughput and range: they told me months ago that their 108 Mbps proprietary flavor has a throughput that's much, much higher than competing proprietary extensions. The proof is in the performance. Airgo justifies the higher price their added value brings at this stage in Wi-Fi's development by the greater coverage area. However, you need new client cards to take full advantage, which offsets some of the cost savings of more coverage area.
Update: Belkin and Airgo provide details in a press release.