You HAVE to check out the thread with the gourmet cake flavors - I'm sure that's the link that Bobwonderbuns has. At least for the recipes. I have learned SO much from that thread. I know that you can use flavored creamers to enhance the cake flavor, but you have to be careful because too much sugar will mess up the texture of you cake.
Go fix yourself a pot of coffee and check out the thread about the gourmet flavors - just be ready to pull an all nighter