In terms of expansion the Interchange suite is capable of such. In the words of the Guru - Mike Heins "anything is possible". If you subscribe to the Interchange mailinglist: 
Interchange Mailinglist
There are many people who can help out with such ventures, of course a very good knowledge of Interchange and a variant of SQL is necessary. Dan Browning (from the list) has achieved many solutions in this area as have others.

In reply to Re: Re: interchange for e-commerce? by barrd
in thread interchange for e-commerce? by dshahin

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