WDNERING,

According to Liahall's reply in this thread,it looks like the middle of October.

http://agoracom.com/ir/Mannkind/forums/discussion/topics/532570-option-question/?message_id=1683255#message_1683255

However,OPC is correct,the warrants are starting to look better at this point.Here's a thread that explains them quite well.

http://messages.finance.yahoo.com/Stocks_%28A_to_Z%29/Stocks_M/threadview?m=te&bn=25210&tid=245144&mid=245144&tof=52&frt=2#245144