As my project becomes presentable bit by bit I want to share it with you (altough it's not stable yet). It's a home automation framework consisting of a arduino lib, a onlineservice and a android app for now. If you think it's interesting you can find more details about it in my blog.
Here are some impressions:
Create a virtual remote control panel
Use the virtual remote with your smartphone by scanning the QR-code
Define events and actions based on your input/output devices
This is my prototype setup at home to open the door, control 433MHz power sockets and measure temperature.