Mac OSX Tiger is going to have a program called Automater within the finder. Is there a program for windows that does the same thing? kinda like a batch renaming process. i think it would be cool to have that in windows.
Batch renaming shouldn't be a problem really, or hard to make if you wanted to.
But automator is so much more than that, the demo didn't show any of it. You can chain programs to carry out quite complex tasks. This however won't be very likely to be seen on Windows since most Windows software don't follow the command line standards (with input/output piping and what not) that most *nix software does.