Use it for anything where you want a really light and tender texture. These are some of my favourites:
Big Crumb Coffeecake
Classic White Layer Cake With Raspberry-Almond Filling
Coffee-Chocolate Layer Cake With Mocha-Mascarpone Frosting
Very Vanilla Cupcakes With Easy Cream Cheese Frosting
Savory Cheddar Chive Biscuits
Elvis Presley's Favorite Pound Cake
Also, you can find lots of recipes on Swans Down Cake Flour's website.