YEAH!!!!!!!!! I think Flickr is the best website of all any other photo sharing sites...because not only you could share photos but you could also do a lot of things such as....... making friends, upload photos and share it on web, you could also make some stuffs like calling cards, photo-books, slideshow-DVDs, postage stamps and you could also search some pictures that you will need, like for school, or any other things that you like to do with it..............
i'm telling you......sign up for flickr now............it really has a loooooooot! of good stuffs!
enjoy!