My experince with writing shopping carts is from a small busness -- just me and my best friend. I thought the format was pretty simple, but Mark, for the life of him, couldn't change prices, so it eneded up taking both of us (I have no head for busniess, and numbers in purticular), which lead to our prices being constantly out of date... which is one of the reasons my address is no longer james@rtweb.net, if you get my drift.