I think they may have had a small pivot recently, but Room77.com was building software that let you do things like see what the view will be from a given hotel

I think they may have had a small pivot recently, but Room77.com was building software that let you do things like see what the view will be from a given hotel room and get info on things like street noise. This would be up their alley as well. It would involve manual data collection but it could be a very useful service. Configure a handheld of some kind that can sit in a (vacant) room for a few hours--maybe a day--and measure ambient noise, wifi signal strength, even the amount of sunlight.