The ethics questions seems to revolve around the use of copyrights on naturally occuring genetic materials that result in large profits for the holders of these some what questionable copyrights and prevents others from using naturally occuring materials to create low cost life saving drugs. This is a WTO issue. So I would imagine you could find the pros at a pro WTO source and the cons at an anti WTO source. It does seem like a fairly questionable practice to me.
Whoever decided you can copyright mother nature is completely nuts.
