Interestingly enough, recently (Apr 28, 2011) John Kelly has been appointed to the Board of Directors of the Medicines Company. Could this hint toward a possible takeover being in the works? Maybe/maybe not. but then, this is why its called a speculative position.
MDCO did report good results recently (Link) where it reported 64 c eps vs an analyst estimate of 40 c/eps.
Do your own due diligence. Good luck.
Disclosure: long MDCO since 16.15/share.