This is really cool. Padre that is. I installed it alongside Strawberry Perl in my Win32 box. It is multi-platform, so I installed it in my Ubuntu box as well. It supports syntax highlighting for Perl 5 and Perl 6. There are plugins available now for Perl 6 as well as Catalyst, more to come. I think there's a lot of potential for Padre. The cool thing also about this IDE is it's built using no other than Perl language itself. So if you want to contribute or tweak it, you can.
Btw, I tried to customize the highlighting theme by creating a new style and here's what I came up with. You can get instructions from here.