I dunno, it might not seem as high tech as dyeing, but I think sharpie art can be just as impressive. I don't have any myself, but there's stuff you can do with a marker you can't do with a dye--or at least not easily. Like crosshatching...wouldn't want to even think about trying that with an x-acto! Plus, it's a good alternative for plastics that won't accept a dye well. I've got a few drivers and mid-ranges that Chuck's done for me, which are sweet, but my putters, the discs I use more than anything else, are just hum drum vanilla.
Before I even knew about dyeing, the guy that got me into disc golf got into the habit of drawing a different Muppet on each of his discs. I always thought that was kinda cool, and it gave each disc a personality (I could almost hear Beaker "meep meep meeping" as he flew into a tree or something