Some neat tips.
I think the workflow/Automator feature of Tiger is kind of cool, but still very rough. You can create workflows and put them in a directory to make them contextual menu items, but this is obscure and not well documented. Automator will also pop up some very strange AppleScript errors (it's really just a GUI builder for AppleScript) if you do something wrong. It was also difficult to get my mind around the order Automator wants to do things in.
But after a little effort, I did make a little batch rename thing to add a string prefix to a set of file names. It would've been easier to do in Python but now I can access it from the contextual menu.