I'd like to share my find.
I was very happy with my old text editor (PSPad) while I used PHP, but it has no native support for Ruby highlighting and it was bloated with features I've never used so I was looking for something else.
Then I found Intype. I tried loads of text editors, but this one made me a happy coder.
It has all the common TextMate features on Windows. There are bundles, snippets, UTF-8, highlighters for everything...
They do not market it well so I thought I'd let you know.
Textmate for Windows here