Submitting Your Skin
Great, the old version of Winamp.com with the skin submissions is dead. Well, what are you gonna do now? You have a couple options.
1. DeviantArt
DeviantArt allows file uploads as long as you have an image to go along with it. You could simply take a screenshot of the skin to use as the image and upload the .wsz file. Easy-peasy.
2. The Winamp Skin Archive
You can upload it to the Winamp skin archive located here. This site has a ton of skins and has a player that lets you demo the skin on the website too!
3. The Internet Archive
The Internet Archive hosts a lot of Winamp skins here. The Internet Archive is a great site with lots more than just Winamp skins so I'd definitely check it.
I'm sure there are others out there if you wanted to look hard enough. I hope you had fun making your skin and I hope the tutorial helped you out! Thanks for visiting.