Don't lose track of AMLN. Short intrest has increased from 14M to 25M, these guys are committed, are they over extended? It seems they didn't bother to cover on the run up from $14.50 to the recent high of $23.47. AMLN is currently trading about $19, second day it finds support at this level. While you may not want to buy at this level, you will not want to lose track with 25% short, they are going to have to cover at some point.
http://www.nasdaq.com/asp/quotes_full.asp?mode=&kind=shortint&symbol=AMLN&FormType=&mkttype=&pathname=&page=short&selected=amln&64761
http://www.nasdaq.com/asp/quotes_full.asp?mode=&kind=shortint&symbol=AMLN&FormType=&mkttype=&pathname=&page=short&selected=amln&64761