I would like to see a awesome Bitcoin letter service where you can upload a document and the service prints it out. After the service has received the Bitcoins it forwards it to a real life address (worldwide). Fees can be charged e.g. by number of pages and color/black white.
Of course it must have a API to automate that process.
I am interested in it because I would use it for sending address verification letters to Bitmit users. I can imagine that many other (Bitcoin) services might be interested in that as well!
Go go go