I came across this short, but informative, interview with Liz Danzico, an interaction designer who’s worked for anybody and everbody. She has good tips on what people want to see in a portfolio, and how to make first contact with prospective employers (or how not to).
If you’ll be in New York on May 15, you can even hear her speak on this subject at the Creative Employment Confab. And supposedly the event will be coming to Portland as well (in June). No word on exactly when.