The noodles are wheat Hokkien noodles shipped directly from Thailand and heated in a water bath at each McDonald's restaurant.
I'm a bit curious as to the preparation. Do they actually stir-fry it at each McDonald's restaurant? Are McNoodles even fried? Theoretically, they could cook it on the same griddle as the hamburgers. Regardless, it sounds interesting.
Update 9/20/12: Along with the McNoodle launch today, McDonald's Austria also adds Asian Shrimp Dumplings: