I love Dropbox, but I can move my data to a competing service in an afternoon. They're going to have to execute brilliantly to stay on top of this market if it'

I love Dropbox, but I can move my data to a competing service in an afternoon. They're going to have to execute brilliantly to stay on top of this market if it's really worth that much. 10 billion puts them at 1/18th of Google.