Is this because the proliferation of Skype has reached the point where the revenue from the potential lost subscribers outweighed the revenue from people going over their 'free minutes'? Sounds unlikely, but very cool if so. Now, if only someone Spotify would make their iPhone client use the business model of the desktop version (ad-supported) instead of requiring a full, paid-for subscription.

"could even limit which software the owner installs on his cell phone"

Oh, they needn't bother then - WAP already does a stellar job of limiting software downloads by dint of gradually eroding the soul until you give up and just pretend that you're playing that $4 copy of space invaders you just spent $20 trying to find whilst staring at a rotating hourglass. You even get the RSI from typing in the URL - it's the full experience right there.