I have the eCommerce suite from WA and love it. It is easy to use, support is helpful, and it gives you so much flexibility in creating an ecommerce site that prepackaged applications can't compete with.
Thanks Sgt. I'm toying with the idea of either the WA offering or taking the plunge and trying to modify Zendcart to do what I want.
I don't have Flash on my PC at work (won't let us install it, how bad is that?? Does show you why you should ALWAYS make links etc available to non-flash users as well though) but when I get home I'll try some of the Flash demos on the WA site.