Flickr and Del.icio.us

After having my paper for my last class on folksonomies, I now feel like the social bookmarking expert. In reality I am far from it. My only true experience has been with Del.icio.us. I decided to start using it after having worked on this paper and must say that I am very happy with it so far. I am one of those users that experiences the same problems with regards to bookmarking as those mentioned in the learning module. I use mutliple computers at work and home and in addition multiple browsers on each. I was about to create a portaportal page around the time I found out about Del.icio.us. Needless to say I abandoned the Portaportal project and opted for Del.icio.us. I have a wonderul article that outlines and compares many of the social bookmarking web sites in chart form. I am hoping that over the summer I will have some time to check out some of these sites. I would love to post this article for you all, but I'm not sure if I can find the URL for the article online. I do have it in PDF though, is there any way to do this?

One of the paras in the building came into the library today looking for a picture of a clown for some festival that's coming up. I was busy doing something else, so my para was helping her look for images on Google. They weren't able to find anything, so I suggested Flickr, which worked! This is the first time I've recommended this site. I personally have only attempted to us it once, when I was looking for images for my builder. Unfortunately, I didn't find what I was looking for, for that specific assignment, but I would like to practice using it more, however, because it seems like it would really come in handy. Does anyone know if these images are considered public domain? How would one cite them?