Pressing the Super key does not launch the Activities, although the hot key to the top left corner to activate Activities do work. I tried following the link here but the solution there does not work for me.
I am running Ubuntu 13.10, Gnome 3.8 Shell. I had a similar issue with Unity few days back but I resolved that via Unity plugin in ccsm.
Best Answer
Having the same problem I ended up here. Though it was Super Left in the dconf-editor, my super key was not working. Inspired by adiyaarun1's comment, I opened up Tweak Tool—>Keyboard and Mouse. If you change Switch between overview and desktop to Super left the problem should be solved as it was my case.