I've taken the plunge into learning how to create skins for Community Server. My first attempts will be aimed at getting the basic aggregator pages modified to fit 3Sharp as part of our pending upgrade from .Text to CS, coupled with some custom blog skins. I've also got some work to do for my personal blog, which is going to be part of a larger community of blogs, galleries, and shared forums whose other members will include my wife. That's a lot of skins.
The goal is to be able to start writing and posting some decent tutorials and references that will fill in the gap for the lacking documentation. That's part of the fun of being a tech writer; you see great software that is missing equally good documentation and your fingers itch to start writing.
In the meantime, let me leave you with my current list of CS add-ons, skins, and tutorials since the doc wiki doesn't seem to be updated that much. I really don't like wikis to begin with; if I want someone to come along and edit my work, it'll be someone like Phil in whose skills as an editor I have faith. I've done them as an article so I can come back later and easily keep it up-to-date.