I'm a long time Picasa fan. I used it before it was bought by Google and even before I new what the Google is. Now at version 3.0, although not as popular as Flickr, Picasa is a great choice as desktop photo manager and it's Web Albums is a valuable online photo storage. Web albums itself is nice classy web application with pretty good flash slide show. You can even get a code to embed slide show (or photo) into your own blog, which works great for occasional use, but can be daunting if you plan regular photo posts.