Skype has expanded it's VOIP (Voice Over Internet Protocol) service to all Android phones, now. Previously, it had been available only to iPhone users, and Verizon customers. Including Android phones was probably a good move, seeing as Android is the most popular smart phone on the market, and all.
Keep in mind that it still may be cheaper to use your current phone service for local and U.S. calls, and text-messaging, especially if you have an unlimited data plan. But if you make international calls, if your current services charges for text-messages, or Skype-to-Skype calls, it may be cheaper to use the Skype application. Click HERE for more info from Skype about downloading the service on your Droid.
Here's a quick video demo:
Don't use Skype? You might also want to check to see if Google Voice is a better deal for you.
Also see Mashable: Skype Now Available for All Android Devices and Wired: Skype Comes to Android - Really, this time. But you will pay in other ways.
Jennifer Pointer (e-mail) is in Tulsa, OK. She promotes a simple, a low-tech approach to effective online profile management, search engine optimization and social networking.