The one that I thought was most intriguing and most ingenius was the Flickr Retrievr, which finds photos for you based on sketches you draw yourself using their very simple graphic-design widget, which is embedded in the page. You simply select your color and make a dinky little drawing (it functions much like the Paint software that comes on PCs), and the Retrievr will find photos that have the same color and composition as your drawing. I can imagine this would be a fantastic tool for artists who are looking to create art projects using photos that all have a similar "look" to them, and also, it's just wildly fun to play around with!
In addition, I checked out FD's Flickr Toys, which has too much for me to even explore in a day. I got lost on the LOLCAT generator and the website of examples. I think a few patrons wondered what I was looking at that was so funny, but I can't help but laugh when I see something like this:
It seems to me that I would never need a Flickr account myself because while I do take the occasional picture, this website seems more geared for professional or semi-professional photographers who are interested in showing and sharing their portfolios. If I take a photograph myself that I would like to host online, I don't need to have a huge account in a site like Flickr...I can upload it to a photo hosting site like Photobucket or TinyPic. Flickr seems to me like it would be better if I had a whole series of photos I wanted to upload rather than just one or two, which is generally all I have. That said, I think Flickr can be a great resource for those of us who don't have an account. It's almost like a stock photo archive (similar to Getty or Corbis) that you can use to search for pictures you need for projects or anything else non-profit. Of course, I'm sure some Flickr users would prefer their photos not be used for websites or other public forums, but that could always be solved by crediting the photographer or requesting permission to use an image for whatever purpose.
It's a fun website, and I use it myself a lot, but I don't think I would need to have an account for myself. I'm content browsing through everyone else's.
P.S. I hate, hate, hate how every time I add a photo or edit a post in Blogger, it adds about five spaces between my paragraphs. How annoying. I just gave up and added the html myself.

