Advanced Filtering in Google Analytics can help you track sales conversion through you shopping cart. The Advanced Filtering illustration shows how filtering can provide reporting on specific product categories by filtering on the URL.
Below is an excerpt of one Category (Drives and Motion Control) e-catalog recently built that contains over 100,000 items. There are 16 total Sub Categories not shown here.
Behind the tidy pictures and text are over 100,000 items stored in structured database. Major tasks included querying and categorizing Order History. Not extremely difficult. More interesting is the harvesting of product data from external sources. This data is used to complement your existing product descriptions, as well as new products that fit within or extend your product lines.
Drives / Motor Controls Categories
Not performing as expected for e-Business traffic
Read the article on Industrial Data Centers