Marius I agree at least with to Google Froogle theory whhy waste valualbe time on froogle when Google is what yu should be focused on" in fact more their is not a lot that froogle has for the common seo" stay relivant to the cause"
Googlebase is very powerful. If you submit every 3 days as said above, the bots will keep on indexing your products. If you have 100s to thousands of products, that's many links as well as much traffic being streamed from the shopping bots such as Froogle and Google Base.