Earlier today, Digital River Inc. (DRIV) announced that its largest customer, Symantec Corporation (SYMC), notified the company that it will not extend its existing e-commerce agreement. The agreement, under which Digital River provides a variety of e-commerce-related services to Symantec, expires on June 30, 2010. This is a stunning blow to Digital River as sales of [...] (DRIV) Digital River Loses Symantec Corporation, Their Top Client