Ok I tried it and I'm hooked!
Zazzle is a fun way of producing your own unique products. Sure you can run a web site yourself, do the admin and order fulfillment but wouldn't you rather put up a few photos or scanned images and design your own T-shirt, mug or base cap and in 5 minutes get a product for sale?
I've seen these sites before but I've kept from trying them out because I knew they'd be addictive. Sure enough I tried Zazzle and I spent 2 hours finding photos to use and worse spent time designing a T-shirt!
As I suspected it does take a lot longer than 5 minutes...
Do these sort of sites make money?
To be honest I don't know. I just thought it would be fun to have a go. If it does make money I'll let you know.