Wow, this is immensely helpful: Change Multiple Text Layers in Photoshop. As stated in the short article, if you want to make the same change to multiple text layers within Photoshop, you can skip the need to change each layer individually, or create an action. Simply follow these steps:
1. Link all of the text layers
2. Make sure one of the linked layers is currently selected
3. Hold down the Shift key while clicking on on the option bar to make the change
Very cool!
Thanks to Corrie Haffly for posting this on SitePoint.