i was in london yesterday, in the barbican centre and happened upon a bt payphone with a big touch-screen on it. not one to pass up on a good opportunity i visited hardocp and bit-tech. didn't cost me a penny either!! i just filled in the url and away it went.... that was the closest i got to a computer all day(!)
yep, it seemed so.. it said credit £0.00 in the bottom corner, and it let me use it for about 5 minutes without moaning once!