Michael Yuan has worked as a product manager and technical evangelist at Red Hat Inc. working on Seam, JBoss Application Server, and other middleware products. He contributes code to the Seam project and writes about Seam in his blog (http://www.michaelyuan.com/blog/). Before joining JBoss, Michael was a software consultant for mobile end-to-end applications. He published three books on mobile technologies, including Enterprise J2ME and Nokia Smartphone Hacks.
Sam Griffith is a long time NeXT / Mac developer. He was involved in Object C since the NeXT days. He is the coauthor of O'Reilly's JBoss Developer's Notebook. Sam is an OO Architect/Developer/Mentor who has programmed OO systems since 1987. He has used Obj-C, C++, Smalltalk, Object Pascal, Object-Forth (Neon), CLOS, and other OO systems
Norman Richards is also an active Cocoa developer on the Mac and coauthor of JBoss Developer's Notebook. Norman has developed software for a decade and has been working with code generation techniques for much of that time. He is an avid XDoclet user and evangelist. He lives in Austin, Texas.