Google has released a Linux command line tool for interacting with it's services. Most useful is uploading images to Picasa. Here's an example of how to upload a directory of images:
google picasa create --title "AlbumName" Pictures/*.jpg
Download at http://code.google.com/p/googlecl/
Here are some more examples from Google.
I just moved my experimental work with Picasa web albums live. Hit the gallery link in the top navigation.
Incorporating with Picasa makes the task of resizing and uploading images trivial when using F-Spot in Linux. I used to dread the resizing sessions. Now I can just multi-select images and hit export.
The old galleries (Gallery2) are still available. Links are at the bottom of the new gallery page.