Courtney and her husband cleverly turned an IKEA Gulliver Changing Table into a much-needed bookcase. Although they used a very specific changing table, I can imagine something quite similar could be done to ANY changing table. Also, they fabricated the dresser you'll see in the "after" picture, but that might not even be necessary if you happen to find an appropriate pre-made alternative of the correct size. Now take a gander at the outcome:
To see how they did it, visit Project Nursery.
How to Give A Changing Table a New Life [Project Nursery]