Is there any way to search on multiple categories?  For example, is there a way to search on the categories "Business" and "Concepts" so that you only get images that have both categories?

If not, is there any way create a page that would accomplish that?

only way right now would be thru keywords with the category name in them - always a good idea to do, since people are more likely to find you thru a google search than from a category search on your site