Some time back, we posted a comment on our 'Handy Hints' page about the most useless key - scroll lock. 
It's prompted a loyal reader to ask why the '@' key, one of the most useful keys, is still relatively inaccesible.

"We use the @ key a thousand times a day.  Why do we have to press two keys to get it?

A geek will tell you – program one of the function keys to do it.  My response – that’s fine, when I’m working only on my PC.  Then I go to someone else’s and get a potentially nasty surprise when I press that same key and get an entirely different result because its been programmed to some other function

Come on keyboard designers – the blasted @ key should be the single most accessible key of all"

What do you think?