I just put up some source to a python Kivy GUI app that can remotely capture pictures for the Raspberry Pi Camera. It's very alpha, it works, but to get it going you will need to copy files around and get the dependencies installed.
It's not fast enough for live view - it only uses the raspistill command. It uses the python twisted framework for networking. It's totally insecure. I'm releasing it now as example that might help others. If I get a chance, I'd like to investigate using API's to access the camera and get some kind of live view going.
There are a few more controls in the settings menu.
Source is at https://github.com/digitaltrails/piKam