In addition to making all the necessary steps to deal without a technical cofounder (problem: can't iterate without code, solution: crash course in Python programming then), Tracy also really, really works angles that many technical founders wouldn't consider. I did a wee bit of work with her at 500 Startups -- my favorite example of several is that she produced an actual, honest to God, on-dead-tree photo book of her paying customers' wares. It was extraordinarily compelling, both as a product (I have recent experience with wedding product photo books, mostly produced on 1000x the budget of that), as a sales channel for her company, and clearly the hackiest use of paper I've ever seen in a software company.