I've been trying to come up with an idea for some custom labels over the past few days. One I just thought of are the seven wonders of the ancient world. It would fit well with a set I might make, with 3 low denomination chips for cash games, and 4 higher ones for tournaments.
Does that sound like a good idea? I haven't really found anything relating to poker chips in my limited searching, so it would be something new at least. My graphics skills are pathetic at best, though. If I can find some decent reference pictures, maybe I'll send something along to one of the chip labelling people on here

Some of their work I've seen has been really impressive, and at a good price.
I haven't received my chip samples yet, but I'll most likely be getting faux clays (while I save up for custom ASMs).
Found a couple of images, did up a quick mockup to get a general feel for the theme...
Slightly better blue and green chips:
