Very ice idea.
So what does it NOT work in? Works with everything I've tried.
Doesn't work in MS Word, OpenOffice.org, EverNote and probably many others.
Sending the character to the clipboard would definitely be a better way. It's an Open Source app, so I guess that anyone who understands the script (C++ ?) could add this feature by default. Anybody wants to do it?
PS : It could probably even be linked to farr : type the letters in farr, selecting the character sends it to the clipboard. Would it be possible to make a few mofications to make it play nicely with farr? Would make a nice plugin...
EDIT : added this as a plugin idea for farr