In theory the principle behind insider trading has not changed in 30 years - as evidenced by Hollywood's first major attempt at telling the story in Wall Street in 1987. But in practice the process through which companies communicate, and the SEC investigates, changes continuously.Witness the recent investigations into Expert Networks and Corporate Access and their possible role in providing insider information to hedge funds. Investors have always wanted to talk directly with company management to get a better understanding of a company and it's prospects.Before Reg-FD sell-side analysts would [...]