Sort by Category in Search Results

Maybe this has been done, but I've poured over the forums and extensions and haven't found a solution. My site will be based on search to find products, rather than mining through category pages.

I would like each of my categories to have their own specific section to the results page, much like if you search for "blue" in iTunes you would see a few results for Apps, Albums, Songs, Books, etc all matching that search query....but each would show up under a heading for the category. You could then click "see all" to filter a specific category.

Is this possible? Thanks!