Does anyone know of any other msg boards, or e-mail lists that are dedicated to winamp skins developers? Thanks

http://www.deviantart.com

http://www.skintacular.com

http://www.deskmod.com (or for slower internet connections: http://dmo.deskmod.com )

These are websites about skins for a variety of applications, but you will find many Winamp skinners in their forums.

And there's of course the 'Share Your Skin Love' forum on Winamp.com.

And don't forget the Winamp Skin Developers Mailing list :)
You can sign up here:
http://www.winamp.com/nsdn/home/mail.jhtml