Picasa

Upload photos to Facebook directly from Picasa!
Add a simple button to Picasa that lets you upload your photos straight to Facebook! You can put photos in an existing album or create a new one.

One-click setup.
Picasa will automatically download and install the plugin for you.

Over 20 million photos uploaded.
It works for them, why not put it to work for you?

To see the instructions page without adding the app, visit:
http://apps.facebook.com/picasauploader/

Other features include:
- Uploads Picasa captions along with photos
- Resizes images before sending for faster transfer
- Previews of photos on "Create Album" screen

Featured on Lifehacker as one of the Best Facebook Apps!

Note: This is an unofficial plugin, unaffiliated with either Facebook or Google.