(That will help people who can't use Firefox at their day job / all computers that they log in will have same YCN style)
Also you may want to give this facility to everyone and give something else to us 200+ers... May be 5 down votes that we can use on submissions per month...
Isn't the point of CSS that people can customize it in their browsers anyway?
Another idea: create a proxy that modifies the CSS, then all your computers could go through that proxy for your modified version of news.yc.
With Firefox, also check out Greasemoney.
BTW, I was just speaking for people with day job who can't use Firefox. Anyway, proxy should work in that case.
I would posit that excellence in journalism is achieved when releases are scheduled not with the passage of time but with the need to say something.
I imagine we'll hear from pg when he has something to say. And I'm sure we'll be ready to listen.