The Transrapid Maglev Train is passing at a speed of 400 km/h on its testtrack in northwestern Germany. --- Canon EOS 20D with Canon EF 100-400L IS f/4.5-5.6
Acela (US), TGV (FR), Velaro (Ger, although there are British, Chinese and Russian versions as well)
There are other systems, such as the Japanese Shinkansen.