A few days ago I posted a discussion on LinkedIn about eCommerce platforms and software to see what some people think. I got a lot of ideas and opinions. Mostly people were talking about Magento, however there were a lot of others. Of course this was very informal so no one should ever take the advice of a bunch of strangers. However it does show one thing, that there are a ton of options out there when you decide to build a eCommerce store.
You can view the discussion here
http://www.linkedin.com/groupAnswers?viewQuestionAndAnswers=&gid=45691&discussionID=23782867&split_page=1