qoop. a service to turn your flickr photos into a book or poster. i couldn't find any detailed information about picture sizes(just how many photos per page). it's nice that they are using matte paper. there's a faq on the service here. of course when i upload images to flickr i'm not thinking about printing them, so they may or may not be the right size for printing. for my money lulu seems to be a better deal as they offer free postage if you spend over a certain amount of money. but that's not flawless either as i'm still waiting for my toycamera handbook to arrive.