I wish I were a better photographer! As it is, I did find a Flickr group to join where the quality of the photo isn't as important as the content. I'm still finding Flickr a little confusing for some reason, and it took me a bit to figure out that you post to a group from your own pictures, not from the group page. But now I know!
Moving on to #5, I'm looking at some of the Flickr Mashups: so far, Retrievr is kind of pretty, although to me it seems to be searching more by color than by the shape of the image. An issue I have with it is that, once you've found an image, what can you do with it? It doesn't belong to you. Spell with Flickr is likewise fun to look at, but how much can we get away with using the pictures in pulls up?