I agree, very few [if any] have that much space available.
I'm seeding the Rainbow Tables, and have room for 150GB more for this project, but 1.5TB is not an option for me. :cry:
Of course, that brings up the question, who is going to build an interface that sits on a web-server that connects to 30x different boxes, of which will probably all have dynamic IP addresses. Even with services like DynDNS, it could be flaky at best.