I don't get what makes it better than like a Minus? I would like one of these drop.io replacements to offer encryption or passwords to get to their shared content. Similar to what dropsend does.
I would love it if this synced your chrome profile with your phone, so my bookmarks were present on my mobile. Also it would be cool if it tried to match your apps and extensions to possible chrome mobile extensions and sync those as well...come on chrome team!
This is a pretty good list. I would also recommend running your ads for some time to see when the most productive traffic is and then dayparting to allow you to have higher bids when you can catch the biggest fish...