Flickr is fun, although I don't know what I'll do with it or in it yet. I've uploaded some recent pix, put some of them on the map, grouped them, tagged them, and viewed a few photos from random picks by Flickr. I can see - maybe - using the map application in the classroom.
More fun was a brief foray into their third party applications - I hope to create some posters and notecards later this week. I especially enjoyed playing with the tool that would let you "sketch" something, then find pictures that matched in shape and color. Again, don't know how I'll use this, and I don't have that much time to play these days!
Fortunately, it took very little time to determine how to upload and organize pictures. I like the privacy feature, as well!