Heather and I disagree profoundly on this. I have never met a scientist who has argued for CC-NC over CC-BY. There is a very strong case against CC-NC, with significant research into the issues (not just opinions) put by Hagedorn, Mietchen et al.  <a href="http://www.pensoft.net/journals/zookeys/article/2189/creative-commons-licenses-and-the-non-commercial-condition-implications-for-the-re-use-of-biodiversity-information">http://www.pensoft.net/journals/zookeys/article/2189/creative-commons-licenses-and-the-non-commercial-condition-implications-for-the-re-use-of-biodiversity-information</a>.<br>
<br><br clear="all"><br>-- <br>Peter Murray-Rust<br>Reader in Molecular Informatics<br>Unilever Centre, Dep. Of Chemistry<br>University of Cambridge<br>CB2 1EW, UK<br>+44-1223-763069