This week's book giveaway is in the General Computing forum. We're giving away four copies of Arduino in Action and have Martin Evans, Joshua Noble, and Jordan Hochenbaum on-line! See this thread for details.
The reason for those posts is that there's a book promotion going on for "Head First PMP" this week. The number of posts concerning PMP will go back down once that's over. In general, we don't get many questions about it.