Does anyone have any information of a place to look regarding the status of specific airports? I need to book an upcoming flight to Europe in December and am not sure how to determine which airports are best to fly in and out of to avoid lines. Also, once one is registered in the system, does that mean that the lines will no longer be long for them on subsequent visits, or does the registration mess feed into the lines for people who are already registered?

Last time I flew into Tokyo, it seems that they did an amazing job of capturing fingerprints efficiently without having long lines. Additionally, I greatly appreciated how courteous all of the Japanese agents involved in this and passport control were. I wonder if other countries can learn from Japan.