User blog comment:Lancer1289/Wikia's New Skin, the countdown begins/@comment-1074875-20100928213440/@comment-2088100-20100928223948

The only way to download it is to just copy and paste the code from mine into your own. (eg. copy the rules that you desire from User:Dammej/monaco.css to Special:MyPage/monaco.css). If you decide that you'd rather not have any rules, it's a simple matter of deleting all the text from that file.

And yes, we can obviously customize the theme. If it were possible for people to be more up-in-arms about the change, disallowing any customization would be one way to do it...