I see a bunch of questions like https://askubuntu.com/questions/49348/how-do-i-set-a-theme-in-oneiric that are closed as "too localized.... unlikely to every help any future visitor".  Well, the answer to it would have helped me (I think), because I can't find the Appearance dialog either.

https://askubuntu.com/questions/18641/theres-an-issue-with-an-alpha-release-of-ubuntu-what-should-i-do says I should instead 

 * **file a bug** -> well, I don't know if this is a bug, and if it is it's probably a dupe, and I'd rather have that discussion first.  Filing bugs about transient issues is no more helpful than opening questions about them.
 * **forums** -> kind of ironic for askubuntu to point there, since they have an even bigger problem with old posts
 * **irc** -> yeah, I can, but I'm disappointed.  irc leads to people asking the same question again and again.