I have set up a debian repository for Raspbian with some ROS packages. I am still fighting with the build farm to provide with more of them.
Raspbian users can set up this repository easily with these few steps:
1. add the signing key:
2. create /etc/apt/sources.list.d/rospbian.list with the following:
3. update apt sources
sudo apt-get update
4. install ros packages (a good choice would be ros-comm, it will install roscpp, rospy, roscore...)
sudo apt-get install ros-groovy-ros-comm
Hopefully this will give many of RPi users a good start to focus on more entertaining applications!