Sites that are in beta have the good ol logo, that looks very, very cool:
Looks neat, right? If you're worried about changing it, you really shouldn't. You're in private beta, where you've got the same beta structures, with a gazillion other sites (yes, each word is a different site).
You'll get a logo and complete site design when the site is about to graduate. That will take a while, but you better put your feet back and relax about this :)
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