[ewang1]

If I recall correctly, the Shanghai one topped out at around 478km/h... They actually run at that speed only a couple times per day.

[jpatokal]

431 km/h. I've ridden it, and it vibrates, for lack of a better word, disturbingly; you can really feel that it's pushing the envelope of what's possible. Not a big deal for a 7-minute ride, but would be a bit annoying to put up with for an hour.