Wetpaint does not allow for changing a user name per se. This is due to email accounts associated with a user name.
The way to change your user name.

1. Sign in to your present account for Wetpaint
2. Go to your profile
3. Select Change Email and Password option at the top right of the profile window
4. Verify your password
5. Change email address to a bogus email, such as kingtut@egypt,com
6. Save changes.
7. Sign out
8. Join Wetpaint with a new user name and your real email address.
9. You have just changed your user name.

Keep in mind, if you created any wikis or joined any wikis with the old user name, you will have to rejoin them with the new user name. You will lose all of your permissions with the new user name..

See this thread for more information:

http://splats2.wetpaint.com/thread/3736910/Change+User+Name

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Ah. Okay. (Still kind of figuring wetpaint out!)

~Batty (Katriel)

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