Nope, still unable to edit in the wiki.

Looks like you have to send an e-mail to support to do this now. Sigh.
James

Edit: Due to major infrastructure changes we're implementing in our users' database, we have disabled the ability to modify usernames in the Dashboard the only way to change the username is to delete the account and register again, to delete your account please fill up the form: http://tinyurl.com/WazeDelete.

You have got to be kidding me.... I guess I have to make an alternative account to edit the wiki and keep this one for editing. Urg.

http://www.waze.com/support/
Type in: username.
James

Underscore just doesn't work. I had to change my username from svx_biker to svx-biker for the wiki Login to work.

See here