Did I say file transfers? That’s an injustice because DropZone can do more than file transfers. It can zip and email files, install apps, upload pictures, post them to Twitter or Posterous (did I tell you about Posterous? well, that’s the next post), print stuff (though you really shouldn’t be killing trees in the 21st century), generate short URLs via bit.ly … and all that for less cost ($10) than it took me to type up this list (what, you don’t think my time is worth $1/minute?).
And if you are capable of coding in Ruby, then DropZone provides a well-documented API using which you can write your own extensions. I plan to write one (though I am not a Ruby programmer) that uploads dropped files to a WordPress blog (using XML-RPC)… using the WordPress provided mechanism (XML-RPC) is useful because uploaded files (images) then show up in the built-in media manager (uploading such files via FTP, SCP, etc., will not have this effect).