Last weekend we conducted 4chan PMQ/Q&A #3, with 1400 people contributing 4500 posts over 22 hours. I managed to spend the better part of a day answering as many questions as possible—thread here. Since loading large threads can be a bit of a pain on slower computers, you can also see my replies from the /q/ index (hover over the "Administrator Replies" quotelinks).
Thanks to everyone who asked questions and participated!