A designer did a very nice design that's pretty hard to me to apply. It's to be applied to Wordpress posts titles so it should work with any text.
So before I turn her idea off, I'll check SO up :).
Titles should be multiline, one or more words per line. Lines will be splitted using PHP according to a given algorithm that counts characters into as even as possible lines, to look like this:
<h1>
    <span>Lorem Ipsum</span>
    <span>Dolor Sit</span>
</h1>
Each line's font-size should be adjusted so it's width equals the full width (fixed) of the h1 box. Also, some neggative line-spacing will be used. It should look like this:

I can afford to use CSS3 and JS on this.