Flickr of course, kicks ass. I have a Zooomr account too which I (sometimes) use to ‘showcase’ the very best of my my photos, but it’s just not quite up to Flickr’s standards. Not least because of Firefox extensions and other apps you can get for it. Have you tried PicLens? Actually that works on any set of images, but still. It’s by far the best way to view photos on the web. There’s also Tag Galaxy which I recommend giving a go. It’s a thesis project by a German student or something like that. Fascinating stuff though. And last but not least, I’m trying to get into FriendFeed. It’s a social network aggregator which brings all your accounts into one place, so you can view friends activities – blog posts, Disqus comments, Flickr and Zooomr photos and loads more. It’s very effective with Flickr. Problem is you have to convince people you know to sign up for it, or there won’t be much to look at! You can see my profile here and add me if you wish!