Enigma Encryption Vs. Modern Computers?

wynlyndd asks: "The story about the recent theft of the Enigma machine has got me wondering. Right now we have a distributed network of machines trying to crack an encrypted message. This has taken hundreds of machines hundreds of days and we have hardly dented the available keyspace. How long would it take a modern desktop computer to solve the Enigma codes?" Most assuredly nowhere near as long as it will take to crack RC5...but I digress.