Hi, and welcome!
As the summary says, this should be a fun project, and an interesting web site. I know a number of people are into coming up with cool Tiki themes, either for their own use or for others. And of course "normal" Tiki users want to find new themes or more appropriate ones or whatever, and want to know how to tweak existing themes. So this site can be the definitive showcase and howto place. I hope anyone interesting in these things will participate any way they like.
So here at the beginning we need to know how to organize the site. Please share your ideas. It's a blank slate, you're on the ground floor, and the sky's the limit!
To let you know what's planned so far, the Templates/CSS forum at tikiwiki.org will be moved here, as I understand it, and people logged in at that site will automatically be logged in here. My idea was to have a wiki page for each contributed theme (rendered in its own style, of course), with links to a forum and download area (file gallery). Damian (Damosoft) has written a script that will make it possible for contributed themes (via CVS submit) to be zipped up and ready for download. I don't know the details yet. He mentioned an upload form for people who don't want to go the CVS route.
Anyway, I figured we'd also have tutorials on the basics or details of Tiki theme-making; links to resources like graphics, CSS references, Web standards info, commercial Tiki theme producers, example sites, etc.
I haven't done much in the way of site navigation, just adding the basics to a phplayers menu as things are made. We'll want to consider wiki structures, etc.
Of course in true Tiki fashion, any member here can start a blog, make wiki pages, etc. If a gallery or forum or other admin thing is needed, just say the word.