CNet and silicon.com launches atlarge.com for pooling knowledge about airport access: The site has information about which airports have Wi-Fi and mobile access, how good that service is, and traveler feedback. Mapping and navigation are wired in directly. You can be all jet-set, and enter the three-letter IATA code for an airport, or go new school and type in the name of the airport or its city. The site is in beta, so it's not yet well populated with comments. They'll aggregate ratings and remarks, and allow people to vote on which comments are most useful.
One problem with sites of this kind that accept user feedback is that there's no good scatterplot across time of responses. CNet has opted to show Most Popular (by user voting) and Most Recent comments, but that doesn't tell the whole story. A venue changes over time, and particular events or periods may be marked by good or bad service. There are many variables they're tracking, including electrical outlets (which they call "powerpoints," I expect because of the UK HQ of the site), but there's no way to separate out information in a user-submitted review by the particular qualities being rated.
I have had a dream that I fear I will not realize of creating an airport access site myself, one that would use publicly available maps of airports to allow people to click on points where there were outlets, or even be tied in with a Wi-Fi mapping system--Skyhook Wireless comes to mind--that would work by voting. The more clicks by unique registered users that a power outlet was in a given place, the more likely that outlet existed in that spot. (This kind of voting prevents spurious information and vandalism.) Information would age, so that you would hover over points and know whether a review or a piece of wayfinding information was left yesterday or last year, and whether 100 concurred that there was an outlet in that place, or one person.
atlarge.com is a great start, and I hope they see enough traffic (and hence revenue) to drive more sophisticated features that would work in hotels, coffeeshops, and airports, tying in time and geography to pure reviews.