Not exactly an answer to your question, I know. Most startups I know in SF/Bay Area at least do a technical test (either coding or just regular questions) on the spot. It is stressful, but as anything, you can learn how to do it.
Thanks for the recommended books and links. That's actually what I'm currently doing. Studying and practicing. I just wish there was a better way. I feel like I'm back to my school days where your SAT/GRE scores mean more than your body of work. Of course, the difference is that I have to take a test for each company I apply to now.