PicasaWeb is a photo album service that lets you share pictures with people online. You can add a shortcut button that provides a convenient way of uploading pictures to PicasaWeb.

To do this, make sure that xviewer-plugins is installed. Then, click EditPreferences, go to the Plugins tab and check PicasaWeb Uploader.

This will give you a convenient ToolsUpload to PicasaWeb menu item.