there are people here who should know an almost complete answer to that. I am interested in what popular science magazines publish (regular) math corners, and how well those are respected? What are most active, most fun, which ones accept papers by community and which ones only by the regular editors?

Scott Kim, Bogglers, Discover magazine http://www.scottkim.com/discover/index.html Ivars Petersen, MathTrek, Science News http://www.sciencenews.org/sn_wekly/math_arc.asp I dunno how well respected Dennis Shasha's Scientific American column is. I'm ambivalent to it. --Ed Pegg Jr, www.mathpuzzle.com