Google added a new and very useful feature to Picasaweb. You can now create Flash slideshow on Picasaweb and include them in your blog or webpage.
5 different sizes of the slideshow are offered:
144 px, 288 px, 400px, 600px, 800px
Here is a 400 px of one of my portraitsessions:
For more info check Google's blog:
Official Google Blog: Oh, the places you'll go....