I've had good results with an electric moka pot and most light roasts. Makes the strongest coffee in the entire office, and it's easy to maintain.
Theres also the traditional stovetop ones, but I needed electric.
I tried the cafe bustelo 'vacuum bricks' once, but dark roasts just taste burnt to me. I recommend a Hawaiian style light roast, like Cameron's.
748 million? I'll be surprised if they get more than 748 thousand.