Flickr Titles + Descriptions Batch Tools
UPDATED 18-Jun-2008 Script now works on the "post upload" batch edit page as well as in the organizer.
I wrote a Greasemonkey script called Flickr Titles+Descriptions Batch Tools. It adds various tools for editing titles and descriptions in the organizer. Including search and replace text in titles and descriptions, append text to titles/descriptions, Copy description, title or tags from first image to all images in batch.
More Info + discussion @ Flickr Hacks
All other flickr scripts by me are available here: steeev.freehostia.com/flickr/