"Currently, we don't have a way for you to change the screen name on your account. However, you can have your CafeMom account canceled and then create a new one, with a new screen name.
Here's how to cancel your CafeMom account:
1. Click the "Contact Us" link at the bottom of any CafeMom page.
2. Under "Self-Service", click the link that says "Cancel my CafeMom Account".
3. Let us know why you're leaving (optional).
4. Click the "Submit" button.
We will process your request and you will receive a cancellation confirmation once your account has been canceled. At that point, you can create a new account." Cafemom.com
at 12:09 AM on May. 12, 2011