MAPQUEST:
http://developer.mapquest.com/web/info/forums
DevNetFeedback@mapquest.com
WINAMP:
http://forums.winamp.com/
USERPLANE:
http://www.userplane.com/faqs/
support@userplane.com
5MIN:
http://www.5min.com/Info/Faq.aspx
support@5min.com
SOCKETSTREAM:
info@socketstream.org
ABOUT.ME:
support.about.me
platform@about.me