Germanfflyer:

I've gotten the DNS error message too.

Here's a tip: after typing www.mileageworkshop.com and you get the DNS error message, delete the "om" from ".com" Then, re-type the "om" to make it ".com" once more, and hit the enter key on your keyboard.

This works every time for me. (i dont have the Mileage Workshop bookmarked)

Or, use the alternate addresses for the Mileage Workshop as previously posted by others.