You already have a physical presence at your customers, why not give them a distributed data center too? German company AoTerra is building OpenStack into their heating systems.
Will the lower hardware and HVAC requirements out weight operating costs born of density in a traditional data center? I can’t wait to find out.
http://gigaom.com/2013/05/24/meet-the-cloud-that-will-keep-you-warm-at-night/