Implementation languages of popular exchanges What programming languages are some of the popular BTC exchanges implemented in? E.g. MtGox, BTC-E, Coinbase, etc. MtGox is releasing their new Midas trading engine, and there does not seem to be much information available online.
MtGox - Website is PHP, I don't know what their trading engine uses
Coinbase - Ruby on Rails
BTC-e - ???
mcxNOW - C++ 
Vircurex - Ruby on Rails