In case you haven't seen the announcement on Andrew Gelman's statistics blog, Chance Magazine is holding a contest for the best visualization of Burtin's minimum inhibitory concentration data (to celebrate Burtin's 100th birthday). There's a link to the data and more information here: http://blog.revolution-computing.com/2008/12/chance-magazine-graphics-contest.html I don't have any affiliation with Chance or the contest, but the data set seems perfectly suited to treatment with R graphics, so I'm passing it along here for anyone interested. The contest closes January 15. # David Smith -- David M Smith <david at revolution-computing.com> Director of Community, REvolution Computing www.revolution-computing.com Tel: +1 (206) 577-4778 x3203 (Seattle, USA)