I'm awaiting my flight back to San Diego at Nashville Airport, a Boingo powered airport.
My logon using either my Asus eee PC 900 or the Mac Book Air was flawless and fast. I was able to use all my apps without any issues, including IMAP, something the hotel wireless at the Cool Springs Marriott seemed to not permit last night.
Oh, and my speeds? 3 Megs in each direction, and while not the blazing speeds I'm now seeing in San Diego, more than enough for fast file transfers, downloads and email.
As far as I'm concerned, being here in Music City has me singing the praises of the Airport Authority and Boingo, for making this so easy and doing it right. Unfortunately, as Dameon experienced, your milage may vary.