Google Picasa is the product that allows users to organize photos according to several criteria. A new version of Picasa - web albums - is available today. With this version you will be able to order prints of your pictures directly from Picasa. This will make it much easier to enjoy your pictures with your family.
From the Google blog:
Other new features include video upload for easy sharing (it’s just like with photos—select them in Picasa and click the “Web Album” button) and searching tools. Now you can search over your own captions, album titles, and album descriptions, and you can even search for photos in your friends’ public albums. Digging up that picture of me trying to figure out which end of the holiday turkey is "up" should be easier than ever.Link