LaCie have an alternative service that might be more interesting
If you're going to have an always on storage device connected to the internet then LaCie;s http://www.wuala.com/ service might be a better option.
Get an HP Proliant Microserver for £140 (after cashback) install a 2TB for another £60.
Then sign up for the Wuala service.
Trade storage on your server (eg. 500GB) to the service and you will get free backups in the cloud. It is worth reading the details to make sure it matches your needs.