A logo to represent - and appear on - our website. It will appear in reduced size, alongside our title, as a heading on some web pages, and we'll also need a smaller version as our site's "favicon". We may well produce "badges" with our logo on at some point (e.g. "I'm ranked Top 100 at Poblish"), so you might want to consider that too.
So what I'd like to see is a full-size logo (perhaps 72x72px or something like that), an example of it next to our title "Poblish" - in whatever font, size, style, and colour you think is appropriate - and also a 32x32px favicon version.
Colour scheme-wise, don't feel constrained. However, if you can work with our site's existing colour scheme (beige, greys, red + green standouts), great. Please look at: http://www.poblish.org/ to see the kind of thing we do at the moment.
One logo idea I had was for a kind of central silvery disc that radiates a number of different coloured lines/spokes, to represent different political persuasions and channels all flowing into one "improved" central thing. I'm sure you can do better, so although I'd be curious to know if that worked, doing feel constrained at all. I'll mark all contributions on their own merits.
File formats: as appropriate.