Gary Price spotted Amazon promoting Askville more aggressively the other day. For example, a search on travel new york city brings up an Askville promotion all the way at the bottom left of the page, it looks like this:
Also, Kev at SEOptimise notes that LinkedIn launched an Answers service early this morning. You can see it at http://www.linkedin.com/answers?trk=tab_answers. Yes, this is brand new, because last night I was updating my LinkedIn profile and it was not one of the options.