Wow,

what a questioning title.  I am not a "business online" expert, but I did find this article rather interesting and worth a read.

It has some nice reminders about the importance of doing the basics right, such as customer service, shipping and core "business" such as invoicing, accounts etc.

just a quick one :-)

ttfn

David

P.S.  I could suggest that Office Live might be the answer, but for true transactional stuff you need a transactional hosting partner that provides a "basket" function for you - of course, there is Commerce Server 2007....