A North London pub uses a variety of wireless for pub enjoyment and Net access: It's fun to see the variety of ways in which wireless -- especially combinations of wireless -- can be used for entertainment, and have the flip side of providing straightforward access. The article ably covers a variety of revenue, build-out, and usage statistics.
On the error front, the author conflates access points with hot spots: I would argue that nobody in the industry or most individuals would say that hot spot is a synonym for access point. An AP is an AP: a device. A hot spot is an area of service, which may be served by one or more devices using multiple network flavors.
The reporter also says that warchalking is enthusiasts using chalk signs to let passers-by know where free access was available. That assumes that a) anyone is actually warchalking and b) that it's just about free access, which it never was.
Finally, the article concludes with talking about Open Spectrum and a group lobbying the British regulatory authority to think about it as an alternative to spectrum auctions. But the author says that this view has something to do with Wi-Fi enthusiasts, a group of people I'm not sure who is a member. Open spectrum and unlicensed spectrum are actually two entirely different ideas. Open spectrum removes regulatory authority; unlicensed spectrum is highly regulated, but not at the user end, just on the manufacturer side. Users are required to not modify equipment to violate rules, but they don't need licenses to operate.