I looked at existing shopping carts in more detail.
there is one in the list that is really simple, because it requires no PHP/SQL coding at all: http://bitcoinevolution.com
It's really worth having a look.
it does have limitations, but I think that these limitations could be fixed easily with a better API.
I tried to reach the developer.
I am looking at longevity....so a 'middle-man' is completely out of the question.
I don't want to put the fate of my business in the hands of a 3rd party payment processor.
When (IF) I fail, I want it to be due to my own stupidity and not that of a payment processor suddenly dissapearing on me.....
Know what I mean ?
I want to be 100% self sufficient.