Adding to iPhoto from the Finder!
One cool feature of Quick Look that wasn't really covered much is the possibility of browsing through photos in the Finder and simply clicking the "Add to iPhoto" button in Quick Look. It will automatically launch iPhoto and import the photo in a new event. It unfortunately doesn't work when multiple photos are selected so it really doesn't make it a batch importing tool. It can still be quick if you have a screenshot that you want to retouch in iPhoto or just a simple picture that you want to import.