1) My window selector has no icons in it? If I hover over the empty slots, I see the hover help.
I haven't seen this behaviour before. It sounds to me that you are missing some of the texture files from the installation, specifically pot_selector.tga, or that you have an out of date version of the EQUI_Animations.xml file. I would suggest temporarily moving the EverQuestLP / game / uifiles / poweroftwo folder to the desktop and grabbing a fresh copy and seeing if that fixes the issue. If not, PM me and we'll work through what is wrong.
2) The chat windows with no labels - I like it, but how do I move the windows? Without the headers all I can seem to do it change the window sizes?
This is unfortunately a feature of the EQMac UI. Any window that has no title bar but is resizeable can only be moved by resizing it in the direction you want it to go. You can temporarily use the chat_withtitle optional version till you get them where you want them then swap back to the chat_notitle version when you are happy.
Have fun playing with the other optional files (be careful to check the readme files if you are trying the 16x16px minibuff window).
Oh, and good luck in the "Miss Cabilis 2010" Finals. All the judges are using the POWEROFTWO UI and look more favourably on contestants who do too.