What allows you to get an item to be compared to the rest of the items like it? i have the same name, picture, description and simular price of the rest of items but I'm still by myself.
Is this a page rank issue? I don't see how it could be. I'm thinking it might just take time for Google to realize i'm part of the group... But if that's not the case and I'm doing something wrong, i'd hate to sit around for a long time and have nothing happen.
What allows an items to be compared with other stores seems to be the Title. It's my experience that items with the same title are grouped with items that also have the same title... Of course, i'm sure Google also does some sort of word matching calculation to verify that even further.
There are identifiers that you can specify in the froogle feed (from the site owner) that tell Froogle the manufaturers ID for a product. If people use this code then it allows like-for-like comparisons.
It sounds good in theory but e-commerce sites often adopt their own codes for products to fit into a single format. Imagine you supply products from a dozen or more suppliers, it's tempting to put a 2 letter or digit prefix to the codes and then go numeric from there.
If a site used this at the beginning it's going to be a real nightmare updating 20,000 items with manufaturer codes. I know of a few sites that have this problem as they do not have 100% automated processes and hence cannot easily extract the unique ID that would help them.
Apart from using the above codes Froogle is just guessing that products are the same, and even then people write descritions differently, mistakes are made on inputting item numbers etc. Good comparisons are not easy to make.