This week's book giveaway is in the Other Open Source APIs forum. We're giving away four copies of Storm Applied and have Sean Allen, Peter Pathirana & Matthew Jankowski on-line! See this thread for details.
Linux certifications are mainly for sysadmins. There's no Linux certification I know of that addresses Linux programming, in part because relatively little programming is Linux-specific, especially in Java.
Customer surveys are for companies who didn't pay proper attention to begin with.