Show hidden files in Snow Leopard's Open and Save dialogs

Here's a helpful little hint I picked up over at MacWorld: files and folders are hidden out-of-the-box in OS X and this tip makes it easy to show hidden files and folders in Open and Save dialogs windows.

The Hint
In any Open or Save dialog in Snow Leopard only, use the following keyboard combination 'Shift-Command-Period' to show hidden files and folders. Toggle the same keyboard combination to hide hidden files and folders. Nice and simple!