I commited the changes to pictrus that include uploading to flickr. As you browse, you can add images to the queue, and then you can upload them all at once. After they are uploaded, you are presented with a link to the page on flickr were you can name, describe, and tag the image(s) you just uploaded.
Pictrus is just me scratching an itch, but if you find it at all useful (or at least interesting), please let me know. Suggestions are helpful too.