Jeremry Johnstone was a bit on the bored side this weekend, so he decided to work with the Google Picasa Web Albums interface to see what all it can do. The results is this class package that has several of the base features already implemented.
Got bored this weekend and decided to play around with Picasa Web Albums. After a little poking around, found the protocol was pretty basic and decided to see what could be done with it. The first thing I decided to do was to reimplement the "client side" functionality.
You can get a list of albums (including album meta information), a list of photos in an album (including image meta info), have the ability to create new albums, and the ability to upload images to your online gallery.
He also mentions the next step in the process he's developing - a proxy server that will allow uploads from Picasa out to either Flickr, Y! Photos, or Gallery. You can get the code here.