[Montellese]

Cool! Though how about fleshing out a little by also adding support for DLNA Media Format Profiles to the UPnP server and client side via MIME Type profiles?

See these two previous proposal here http://forum.kodi.tv/showthread.php?tid=162225 and here http://forum.kodi.tv/showthread.php?tid=127949

And checkout related pull request about adding initial support for custom UPnP MIME Types for practical implementation https://github.com/xbmc/xbmc/pull/6179

MIME Types and Media Format Profile to support DLNA specifications have also been discussed before here http://forum.kodi.tv/showthread.php?tid=187231

You probably already thought of this, I was just highlight that if something like this is not defined in the project scope then to where are you going to transcode?

Transcoding could also be done through our normal webserver which tools like the Chorus webinterface use to play video in the browser. IMO that would be the easier initial approach than a fully working UPnP profile system.
I fully agree that transcoding is probably most useful for our UPnP stuff but it's also much more difficult to integrate because we use a third party library which is not that easy to modify. It is much easier to add some simple HTTP GET options to one of the URLs in our webserver and use that for development and testing than first having to define and agree upon a UPnP profile structure, hack that into the UPnP Platinum SDK and integrate it into Kodi.