I just saw a post on Saving Your cents about a Key Ring Thing. It got my attention because I thought she was talking about those little monogrammed wrist holders for your keys, but instead I found this:
You input all your bar codes for the many different store cards you have and VOILA - it makes it into one nice simple little card. You can press, "no thanks" on the "amount of copies" section on the last page and it will give you an option to print it at home instead of having them laminate it and mail it to you for $1.97 I chose to print mine and laminate it myself.
Go to Key Ring Thing right now to do yours :)