bylo is right about getting a separate long distance plan like YakCell if you plan on calling long distance a lot.
If you are only planning on calling long distance very little, go to a convenience store and pick up a long distance calling card (find a store full of those long distance calling card posters covering their windows). Sure, you'll have to spend $5 to get the card (but will have the potential to use it numerous times), but calling long distance with Speakout would probably end up costing you at least $5 for a short call.