[eluser]cahva[/eluser]
I also got that many queries with my ecommerce site on large categories. Phil's cache library is the way to go for starters.. Its very easy to implement that caching afterwards(I added the caching also after I finished the ecommerce project).
Looking at the queries itself, there is room for improvement on the database design also but as I said, for starters adding caching will help a lot as the queries will drop near zero.
