OS X Leopard's [Quick Look](http://www.apple.com/macosx/features/quicklook.html) feature is great—select any file(s), jam on the spacebar, and the contents of the file are revealed. This works with Automator as well.
Quick Look an Automator workflow, and a HUD pops up revealing the entire workflow content. In a nice touch, resizing the QL window dynamically scales the content (saving bitmaps). Note that QL only works on [Automator 2.0](/archives/automator-20-review/) workflows; older workflows will need to be opened and resaved.