Jed, I've found that even if the jewel-case isn't cracked, sometimes the little hinge lugs are broken off, rendering the case useless.

My CD wallets are the same length and width as a jewel-case, they even have a spine with the title printed on it for shelf-stacking at radio stations (or at home).

And when I travel to a festival across the country, I ship boxes of my CDs ahead of time via USPS or UPS to the gig.

Invariably a lot of the jewel-cases are damaged, but not the wallets.

I've got about 7 of my 12 CD titles in the wallet format; it means re-formatting the artwork, but that's why I have a graphic-designer son!

Have you ever been charged a percentage at a festival or concert for the 'right' to sell your stuff?

Seamus