"Google restricts the download of entire PicasaWeb albums to
users of its proprietary (and Windows only) software Picasa. A
fairly simple Bash script can do that and even more.
I finally succeeded in making my mother understand that there
exists cleaner ways to share her Christmas pictures than filling up
her contacts' mail boxes. Thus, she has got a PicasaWeb 'gallery'
she feeds via F-Spot. She had such a success with her 'novel'
approach that the rest of the family now does the same. Now, she
wants to download a whole album without having to visualize the
pictures one by one.