Yes, many people have jumped on this.

Same here, not entirely sure if it worths doing it but specifically for me, a million hard drives has been something that has been haunting me due to my work so I may give it a go.

There was a calculator somewhere so if you already have large hd sitting, it may worth a go? I need to look more into it but thought it would be useful to give a brief presentation to people who may have not heard of it before :)