Firstly, thankyou! I use Notepad++ nearly every day. It has all the functional stuff I desire and then plenty more.
It's high time you stood back and had a look at the interface and menus though. Each version I download contains more and more stuff, it looks a real mess now. There is a place opensource projects can for professional advice on usability :
I'd suggest taking a look at it, too.
NotePad++ is a very interesting project, but it should put more focus on usability.
Here's Notepad++ in OpenUsability :
Now we wait for Usability Experts...