Ahhh, you mean
this guy, yes? I'm afraid that no tutorials exist on creating this effect, but I imagine its somewhat akin to icicle text. i.e.
http://www.infinitedesigns.org/index.php?cat_id=1&id=18 - all you need to do is add the icicles to perhaps a solid-colour fill of your object (i.e. the guys face), and then skillfully mask out everything but the needed icicles. It should work on a high resolution just fine.
Its a pretty excellent idea for a tutorial actually! I'll add it to my book of good ideas, and if someone wants to make a detailed tutorial on the effect i'll be VERY happy to publish it!
