I just had a play myself and I like somewhere between 0.8 and 0.85. I'm not a designer though and lean a lot more towards clarity vs style.
When using it I wouldn't want to have to manually pick a theme based on the pic, as it would probably be a database gallery - but a choice of themes is great to have.
Looks very pretty, as does the semantic markup. Personally I'd prefer it if there was a little less alpha, e.g. on the Malta pic the text isn't so clear...
I had the same idea, it's great to know I'm not alone :-)
I was imagining an 'enforced' democratic website ie the website runs the live code that any user can submit patches and/or vote on, and no-one has root.
At some point this sort of thing becomes a co-operative business... kind of big for a side project :-/
Anyway I started a python prototype (see my profile), and would love to bounce ideas off you!