I'm not quite sure if the problem was solved, or what the exact problem was.
I'm using my iPad 2 (with danish keyboard) to control/view my mac mini (danish keyboard) over VNC. I don't have to use RemoterFusion since I have static IP (as I understand it?).
Alright, when I type @, I get a ". However, when I change my keyboard on my mac to US. the problem disappears (not the iPad). Since I don't know the VNC protocol, I guess it could be something with the keyboard mapping in general. Either the program or the VNC implementation on Mac. Could be the latter, I see a related keyboard problem with another VNC program UltraVNC.