The Street's Adam Feuerstein has compiled a list of 22 drugs with PDUFA dates between December and July. Highlights include Vivus ($VVUS), Arena Pharmaceuticals ($ARNA) and Orexigen Therapeutics ($OREX) taking another shot at winning approval for their three obesity drugs, and FDA rulings on two inhaled drugs from Alexza Pharmaceuticals ($ALXA) and MAP Pharmaceuticals ($MAPP). Calendar