Hi all I'm a GSoC student working to provide a webclient for an ocs-server based plasma delivery content system (in short something like kde-look but extended to applications, programs, plasmoids etc.) more info about the project can be found on snizzo's blog http://playgfx.blogspot.it/2015/03/ideas-to-restructure-plasma-content.html and on my blog: http://wolfcliff.blogspot.it/ .
Here you can find two screenshot of what I've done so far:
http://i.imgur.com/iYPke7z.png
http://i.imgur.com/pWbHsCU.png
I am not a graphic designer so any critic/advice/collaboration on the design from you will be more than welcome
Thanks

Would it make sense to keep the design quite close to Muon Discover? See the discussion over at https://forum.kde.org/viewtopic.php?f=285&t=121810 I quite like the design (and would wish, that Muon supported RPM). At a first glance, it seems to me that the usecases are at least somewhat related?

It looks like you're doing much needed work here

From your screenshots I can not quite see if this is supposed to be a stand alone application. It looks a bit like a web client to me right now.