Site's down - I managed to sign up yesterday. For those wondering, Mega offers 50GB of cloud storage for free. The advantage is that Mega offers symmetric 2048-bit RSA encryption, which means that the user has access to both the public and the private keys. This offers a pretty damn good amount of security. That's different than other cloud storage providers because usually the provider has the ability to decrypt your data. The (discreet) idea behind this is that if people upload copyright infringing material, Mega can say "hey look we can't decrypt the data, we didn't know it was infringing!"