i watched the video about submitting sprites, but the function is gone and it's moved on the message boards.
I think that's for the Admins/Mods to use to upload to the site itself. That means it's not open to public use, you have to submit the old fashion way.
The current site doesn't allow public access to the control panel. We're refining the system to allow easier submissions with the new version but for the time being, you'll need to just use the forums.
thanks