So for example, I just setup my downloads folder to automatically sort PDF files into a sub-folder called Documents, DMG/EXE/ISO files into another one called Software, and to delete incomplete downloads after a week.
The most interesting part of this app is the power to run AppleScripts & shell scripts. That gives it unlimited power. I'm trying to figure out how to make a shell script that automatically encodes new video files into an iPhone/ATV friendly h264 using ffmpeg and then send a growl notification when it's done.
So many great OSX apps out there these days.