Uh 50megs.. I tried to set up an account just there because 50 megs is a desirable amount, But it is free, although you need to buy a domain name, and I can't see a way of not paying for a domain name
Domains prices are $6.99 for a .50meg.com domain of $50 for a .com domain.
Just to let you guys know it's not 100% free.