Just noticed on T-Mobile's website that wireless access in DEN & PHL airports that is provided by Cingular (formerly AT&T Wireless) are now charged as $5.99/day if you are a T-Mobile Hotspot subscriber.
Native T-Mobile Hotspots in the RCC/US clubs are obviously unchanged.
Flying to JAC via ORD & DEN in a few weeks with the fam... This was not a welcome change.
I would also have expected some sort of e-mail notification or something - I just noticed it when I went to T-Mobile's site to see if any new hotspots have been activated.