Why is it that UX.Se is the exception to the rule with their site design?
It was shown that UX is still in public beta.
What is the process in which a logo and design is created for beta sites?
Nothing prohibits them from choosing their own logo and design at an earlier point; however, it is required to have your own logo and design for the site to get out of beta. For a UX Experience site, having an early good design on their site is crucial. Why would want discuss UX in a Sketchy theme?
Stack Exchange have their own designers, they usually come into play once the site gets out of beta.
It's part of the The 7 Essential Meta Questions of Every Beta.
User experience :P. I would assume the UX site has a complete design because it's about UX. It would be ironic in a way if they didn't.
See Jin's post: