I'm a happy vim-user and I don't see that change any time soon. But recently I have been hacking around with Padre, an editor writen in Perl and for Perl programmers. And even though I like my non-GUI editor I think Padre has one advantage: It is quite hackable inPerl - my favourite language for hacking.
One thing I wanted to play with was debugging from my editor. It is probably posible to write in vim-perl scripts, but having easy access to all the internals without language barriers made the task of writing a debugger plugin much easier and more importantly, much more fun.
So if you have ever thought about nice features you wanted while editing Perl, then please join the Padre project and keep hacking perl while improving you tools.