Thanks everyone for your thoughts.

I'm proud of the skills I've acquired over the years and the projects I've worked on. And I never think my skills are enough, lately I've worked with meteor, zero-copy packet architectures, iPhone apps, and some security-related issues.

I'm not going to try to hide my age and I'm not going to try to make it a desirable trait. I will hope that bit of ambiguity gets me in for a face-to-face interview which I am very confident will turn out well.

Companies which are so rigid as to wonder whether I'm "young enough" are probably not places I'd like to work anyway.