Not being funny, but do you really feel there is much need for a bespoke editor?
It seems that most folk either use Textpad/Editpad (or whatever Windows style editor takes their fancy) or Visual Studio.
Me, I use GNU Emacs (in Java-mode with full font-locking syntax highlighting which works perfectly with UScript) to edit the code, GNU Make (executed from within Emacs) to compile the code (Emacs automatically parses the compilation output and understands error output so I can immediately jump to any bogus code - usually typos). I also use a number of tools - most notably grep - from within Emacs to assist my UScript coding, and seamlessly check files in and out of version control (I use rcs) with it.
Of course, I tend to do most things from within Emacs anyway, but still, unless your planned editor has some supremely useful functionality I doubt many people will take to it.
I don't intend to be negative, I guess I just think that maybe your time could be better spent coding some cool UnrealScript code rather than working on a fairly big project like a text editor (a wheel that has been invented many times before).
Regards,
ynohtnA.
[This message has been edited by doktor_ynohtna (edited 01-16-2000).]