I've been playing around with a potential flickr killer called Shutterbook.com. It's new, in beta and sitll has some rough edges. It's got a great interface, can be accessed via RSS feed and by a simple url (davekurt.shutterbook.com). I put a sample album out there to check it out. Whereas flickr is great for individual pictures, Shutterbook seems to do entire albums best. The album viewer is very fast and slick.