We are currently using Yahoo! Store for our shopping cart. Howerver, we are going to start with AOL and MSN. As they are competitors with Yahoo!, they are refusing to interface with Yahoo!. So now, I must find, install, and setup a shopping cart to interface with AOL and MSN.

I am looking for a shopping cart what will allow us to interface with AOL, MSN, Credit Service International, allow dynamic pricing, updateable information/prices, and updateable web pages (from uploads).

Any ideas or suggestions?