Here's the latest I/O Speaker Circle (v3, May 7th edition)
18 new speakers added including: Mike McGeary Jeremy Robbins John Hjelmstad Jeannie Foulsham Jen Pahlka Adam Eijdenberg Grzegorz Gogolowicz Benjamin Wiley Sittler Sergey Panitkin Brynn Evans Martin Gannholm Derek Slater Sunil James Sarah Peterson John Cormie Navneet Joneja and Kevin Callahan