I'm back. I went to Chicago and Florida a while and came back with a 15g platinum ring.
Yesterday, I had need to download a brother-in-law's Picasa photo album. He had a sizeable number of pictures and, although I could view each picture individually and use the Picasaweb's "Download Photo" function, I wanted them all.
I looked at the Picasa application and saw in the File menu there's an "Import from Web Albums..." function - but that's just for your albums. I wanted someone elses.
I looked through Picasa and Picasaweb's help for a while until I realized it's Google, it has an API. I've always wanted to play more with the Google APIs, having used their chart API.
My winapp browser took about an hour, includes a login, album lister, picture lister, picture preview, and album download functions. The real kicker was a subclassing of the PhotoQuery to create the proper REST URI to access "unlisted" albums (as long as one knows the correct authorization key).
There are a bunch of things that could be improived, but for an hour - which is slightly more than downloading 100 pictures by hand - I've got a reusable app to pull pictures!