Did I understand the article correctly in that they simply managed to reach 500 meters with wi-fi? If so, I don't see what they have actually achieved. In the e

Did I understand the article correctly in that they simply managed to reach 500 meters with wi-fi? If so, I don't see what they have actually achieved. In the early days of 802.11b I regularly connected my wifi-enabled (via dongle) Palm PDA to open networks that were sometimes hundreds of meters away, and the airport free wifi I could use from 1.5km away (at least - it could be longer, it's just that the place I frequented was that far away). The usable distance started to shrink drastically as the airways got more crowded, and as soon as you could see tens of networks at the time then suddenly the cafeteria network was only usable from inside whereas before you could use it a couple hundred meters away, across the large square. Of course, if it's about managing that in a crowded network space.. but the article was extremely short on details.