The two birthday cakes I made for Ian's and Emma's birthday have been published at www.coolest-birthday-cakes.com. This is a website that publishes pictures and the methods to make a homemade birthday cake in various themes. The only requirement is that you make and decorate the cake yourself. You can check out my two cakes by clicking on these links:
Ian's Power Ranger Cake
Emma's Good Luck Care Bear Cake
Take a look around, maybe you'll find some inspiration for your next birthday cake!