The first thing I noticed on my new Apple keyboard was the Insert-key being replaced by a FN-key. Quite hard to get used to when shift+instert is hard coded into you mind 
image source: netninja.com
Unfortunately, running ‘xev’ shows that the FN-key doesn’t send any hard-link keycode what so ever (like keycode 110 for Insert).
Quick and dirty, I worked around by mapping the F13-key (above the FN-key) to Insert. This can be done by creating a ~/.xmodmap file with the line “keycode 182 = Insert” and starting “xmodmap ~/.xmodmap” from GNOME Sessions, like this:
This works for me. If anyone has a better solution, like embedding in x.org or making it work at system startup instead of enabling this on the start of a GNOME session, let me know.
It’s a nice keyboard. You should get one
Under MacOS X11, you have to use keycode 113. I’m posting this here in case someone’s trying to do it Mac-native instead of Linux.
Good one … thnks
Excellent , just what I was looking for.. thanks.
For info under KDE you just have to create a shortcut in /home/YourUser/.kde/Autostart/
according to
http://support.apple.com/kb/HT1216
you can use "fn + enter." that doesn't work for me, but "fn + return" does.
The above shortcut doesn’t work for me. I have to use
ctrl + shift + fn + return. YET I STILL HAVE 19 DAMN FUNCTION KEYS WHAT THE HELL ARE THEY FOR.