Taking some profit in Digital River (DRIV)

I'm offering half my position in Digital River at $35.65. I had suggested buying it at $31 after it blew up. I'm a little worried that Symantec, their biggest customer, has had another in a series of lousy quarters, which is why I'm selling half. I still love internet software distribution as a business and think they're a likely acquisition candidate, which is why I'm holding onto the rest.