Interviewing David Schwartz, Chief Cryptographer at Ripple - what are your questions?

Software Engineering Daily (http://bit.ly/1JY1wfJ) is interviewing David Schwartz, Chief Cryptographer at Ripple, this Friday. What are the most important questions you want answered by the Ripple team? Post them here, and we'll ask the best/most upvoted questions via /r/CryptoCurrency http://bit.ly/1KLqxVX