In a year or so, I think that I'll be able to recommend Mega.co.nz as one of the best file hosts on the Internet today. The advanced features of this destination make it one of the more suitable places for those that want absolute privacy. See, the encryption provided by Mega allows users to put their content online and share with people without anyone knowing what's going on. Mega has made it that way so that even if they wanted to see what a file contained, they wouldn't be able to do so.
The site has a pretty competitive pricing structure and the only reason why I don't put it higher on this list is by virtue of the fact that people might not trust its ability to stay online given the history of Kim Dotcom. It also needs to see a few more adopters of adult files before it becomes a mainstream destination to put your files on the Internet.