I am a big fan of Put.io. This seems like a contender to replace it, although there is a long way to go. One of the wonderful things about Put.io is that it is

I am a big fan of Put.io. This seems like a contender to replace it, although there is a long way to go. One of the wonderful things about Put.io is that it is so versatile. I use their Boxee app, Android App, iPad app, as well as the web version regularly. That's a lot of work to replicate.