ROS answers seems to be down, there's only a "502 bad gateway" error
visible.
http://www.isup.me/http://answers.ros.org/
ros.org in general is up and working.
Best regards,
--
Armin Hornung
Humanoid Robots Lab, Albert-Ludwigs-Universität Freiburg
Contact:
http://www.informatik.uni-freiburg.de/~hornunga