I am interested in finding which products are the most sold(demanded)
online or offline (or both online/offline).

I need a source(s) which update the data periodically and frequently
(at least 4 times a year). I am interested in north america data (just
US would be preferred)

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Clarification of Question by capol-ga on 05 Jul 2005 19:00 PDT

I do not need the actual data (although if you have it will be great).
I am looking for links to research sources (free and/or paid) that
provide such data for all online sales or specific categories.

Well. The three get-rich-quick products are these: Sex, religion and
how-to-get-rich-quick. Currrent American Cable TV has shows that
combine all three -- particularly on the religion channels.

i am not asking for quick to get rich schemes... i just need a source
thats tracks demand of products by consumers