Many years ago I published a couple of PHP scripts for pulling images from PicasaWeb. Once I stopped using them for my site I let them wither a bit. Now that I've caught the github bug, I've decided to publish them there. They still seem to work just fine, thanks to Google for keeping the API consistant over 4 years.
This is a really simple script that lists the albums from a specified picasa account and lets you link to another URL using the album name. It's handy if you're using...
Another simple script that displays all the images from a given album using Lightbox 2
The point of both scripts is to let you take advantage of Picasa's free and fast image hosting, but integrating it into your own site (replacing the rather drab Picasa UI). Both are available from my github account.