Pickup Photo Uploader
According to the site, some of the features of the extension include a multiple picture upload (really cool), Drag and drop from your system file manager, tag pictures individually or in batches, add photos to an album, and display how much space is used.
The extension worked flawlessly when I uploaded my pics to Flickr. If you have a batch of pictures, this extension will work wonders for you. It installed without a hitch and the extension is located under the Commands pulldown as Pickup. Pretty simple.
If you know a lot of pic-heads who use a photo site extensively or know of a beginner looking to get into photography, Pickup will definitely take you where you need to be.