Yvonne M. Harryman is an Architect at Microsoft, specializing in SharePoint technologies. She has implemented and designed SharePoint solutions for clients such as the White House, the US Air Force, National Institute of Health, Iron Mountain, Ingersoll-Rand, and many others.
Michael Galpin is a developer at Bump Technologies and worked on two of the most downloaded apps on the Android Market, Bump, and eBay Mobile.
Matthias Kaeppler is an Android and API engineer at Qype, and he created or maintains the Android open source projects Signpost, Droid-Fu, and Calculon.