Hopefully you all have started using Quicksilver by this point. I use it mainly as a file/folder/application launcher and I'm completely addicted to its ease of use.
Although it can be used as a simple launcher it's capable of so much more. It can be configured with triggers and actions that allow it to do just about anything. Merlin Mann is a huge proponent of workflow management in Quicksilver and you can find him at 43folders.com.
Quicksilver Site: http://quicksilver.blacktree.com/