Catagory Limits?

Is there a limit to the number of “Categories” that can be used in a NS store?  We are in the music space and thinking of the best way to organize around an individual artist.  We are not going to be operating a typical ecommerce site where users come to the site and search for items. Rather, traffic will come to us from partner referrals, linking to specific artists. We believe keeping the site relatively flat, with each artists in their own “bucket” (category) is the simplest way to go, passing the category in the URL string.  We’re looking at