I see that many SE sites have their own logo and unique colour and the others dont. I assumed it may be because those with an icon are out of Beta, but I was wrong, sites like https://craftcms.stackexchange.com/ already have a logo.
My question is, is it an action that the community can do on its own or does it require some sort of a voting or approval from the parent meta. And if its within the community, what is the process to be followed
Edit: http://blog.stackoverflow.com/2010/07/the-7-essential-meta-questions-of-every-beta/ so this effectively answers some part of this question, so yeah lets take this as
"What should our logo and site design look like?"