I wish that Apple had added an easy way to bulk rename files in the Leopard Finder. I have a lot of pictures that are emailed to me that come with weird, cryptic names. I like to add the year and a short event title to the filenames of batches of photos like this. I have experimented with two bulk renaming utilities on my Mac, and my favorite is Renamer4Mac. It is really cool and fairly easy to use. Simply drag a group of files to the program window and you can see the current filename and a preview of changes you are making. Typical features such as numbering, capitalization, match/replace, add/subtract are all present. Changes to even very large groups of files are near-instant. A batch renaming program like this is very useful. Plus having better file naming habits will ultimately improve Spotlight searches. Give it a try.