I'm in the same boat. I love my pinboard and dropbox, but I still email documents to myself. Mainly work documents, and since I consider my dropbox a personal account, I don't store work documents on it, or install it on my work machine.

Also, rave for pinboard: It hits that spot for me of doing one thing, doing it well, and not trying to do any other goddamn thing for me. It is $10. I think it's worth it.