An Austrian hosting company is offering free Linux server co-location service in its Graz data center to anyone—as long as the server is a Raspberry Pi.  EDIS, which has other co-location data centers across Europe and even provides hosting services out of Chicago, is offering this service to anyone willing to ship their Raspberry Pi ARM-based Linux system-on-a-board. 

There are a few limitations on the co-lo service.  Those willing to ship their hard-won Ethernet-equipped Raspberry Pi to a boarding school in Austria will need to preconfigure it with a static IP address before shipping.  Users will also need to include a USB thumb drive for storage—no USB-connected hard drives will be accepted—and send along a USB A cable to provide power to the device.  Once configured in the co-lo, EDIS will provide reboots of systems for free "within 24 to 48 hours" (so don't expect five nines of uptime). 

Considering EDIS is offering this co-location for "an indefinite period" without a monthly charge or even a setup fee, this is probably the best co-lo deal ever.  EDIS doesn't even require a credit card number up front—all you'll ever have to pay for is shipping there and back.