Mindblowing set of features in drop.io -  a dropbox for sharing files, ok I get that… that you can add to by mailing to an dedicated email address, ok…  or leave voice messages by phoning up, nice… or store conference calls… be alerted to new stuff by twitter, or podcast of contents… and then you can go on to customize views and access, charge people for access…  wow. It’s a kind of meta-app (it’s the ning of filesharing)