I don't know DripDrop (nice name), but messaging is really the way to go. For example with Photon or any system really embracing the message passing approach of

I don't know DripDrop (nice name), but messaging is really the way to go. For example with Photon or any system really embracing the message passing approach of Mongrel2, you can get an HTTP request and send back an answer to other connection over jsSocktet (real time analytics for example) or even directly into an HTTP stream (chunked encoding in long polling). The flexibility to easily address a message to a given connection from everywhere at the backend level is what is wonderful in the protocol developed by Zed.