I'm going to hazard a guess (an uninformed one, since I only have my home network available) and say that the feature is specific to attwireless, since iPhone 3 logs into the attwireless network automatically without visiting the web page and logging in and such. WiFi can be pretty slow/heavily used at Starbucks, I often turn it off and just use 3G.

First, this is weird because I don't remember submitting this Finer Thing, which is just kinda weird. Second, Phillip: this site is not dedicated to new information. Third, and you may just have been using something to mark the general time period, but Leopard has nothing to do with the feature--there's a different key command for Windows, for example.