community manager job for Articulate

I saw the job posting and while I am not applying, it did make me wonder about creating a portfolio. I like the idea of being prepared.

What are some of you using for your portfolios? I used to have everything on a CD that I'd share with employers (that shows how long it's been since I've looked for work). I was thinking of using one of those creative portfolios sites or maybe even a blog.

What do you think?