I've heard all sorts of praise and criticism about Google's new look for all it's apps. Honestly, I liked the black bar at the top, but that not really the point of this article.
So Google Sites go its own little stylistic refresh and non Google Apps users have been testing it out over the last couple weeks. Anyways, that new look becomes permanent across all Sites users and accounts.
From a recent post by Google, on 12/6 the new look will be the default standard look and I'm so far not sure that you can hold on to the old look. I wouldn't imagine so at least. So warn your Google Sites end users. Like me, I think they will find it a refreshing change.