Msg#: 4124827 posted 5:32 am on May 10, 2010 (gmt 0)
I would recommend "ASP dot NET Storefront". It's not open source, but you can purchase the source if you like. This is what I use to run my eCom site. Also has excellent SEO support and good integration with payment gateways, shipping carriers and more.
[edited by: lorax at 2:58 pm (utc) on May 10, 2010]
Msg#: 4124827 posted 8:22 pm on May 14, 2010 (gmt 0)
I haven't seen v5 of Miva Merchant, but v4 would let you create multiple storefronts with separate payment, shipping, tax, customer records, and order fulfillment. I would think all that is still available in v5.