There are potential bankruptcies or take-unders on this list, proceed with caution.
From Schaeffers Research:
Here are the results for today's unusual stock volume scan. The scan looks at the previous day's volume and compares it to the recent average volume. It then sorts the stocks based on those that showed the biggest increase (the "unusual" part) in volume.
Companies included in today's scan are: Castle Brands Inc. (ROX), AtriCure, Inc. (ATRC), Crosstex Energy (XTXI), Lee Enterprises (LEE), OceanFreight Inc. (OCNF), Cott Corp. (COT), KongZhong (KONG), Comtech Telecommunications (CMTL), Solarfun Power Holdings Co., Ltd. (SOLF), Estee Lauder Companies (EL), Advanced Energy Industries (AEIS), Empire Resorts (NYNY), Virgin Mobile USA Inc (VM), Elan, plc (ELN), Crocs, Inc. (CROX), Canadian Solar Inc. (CSIQ), Vitesse Semiconductor (VTSS), PMI Group (PMI), Ctrip.com International (CTRP), James River Coal Co (JRCC), JA Solar Holdings Co., Ltd. (JASO), Liz Claiborne (LIZ), Fortress Investment Group LLC (FIG), China Finance Online Co. Limited (JRJC), China Sunergy Co., Ltd. (CSUN)....MORE