You know what I've always wanted to see?
A thickly-leather-bound book... the pages of which also appear to be skin. One that may be folded from page to page... and each fleshy leaf contains a depiction of a Voluval mark. The whole thing harkens back to the truly savage ages of the Minmatar, when they were just Brutors clubbing Sebiestors over the head with clubs, but already they had this profoundly developed religious ritual, and skin-bound tome that goes along with it.
The book starts with the worst marks possible. Each page is, in fact, the sliced-off, dried-out skin of some poor bastard to receive the bad mark in the ancient past. Back in those days, when you got a bad mark, they just skinned you alive and cut out the choice bit to put in the book. The Pale Eye, the Slaver's Fang, the stuff mentioned in PF. The marks that mean you'll turn out to be a traitor, a predator, a gossip, a thief, a negative influence on society. A few new ones could be added here, too.
As the pages progress, they move from the worst marks to the worse, then the not-so-bad. The not-so-bad section is in fact the most extensive; after all, only a few people get the Ray of Matar like Karin Midular. The rest just get the bull icon, like Midular's friend did in the short story "Ray of Matar" - or some other generic mark that means they'll be a good pilot, or engineer, or street-sweeper.
And they conclude in the greatest marks one could possibly achieve. The Ray of Matar, determining a future leader. The Fuckload of Missiles, determining a future pro at deploying the Gjallarhorn. Etcetera etcetera.
Basically I really would like to see an entire encyclopaedia of Voluval marks.