With stock option grants by many public companies sitting under the microscope of authorities these days, count RIM inside that select group. The company who made thumb-able email popular and en vogue has another fan looking into the culpability of stock-based accounting practices: the U.S. Attorney's office. RIM has "had contact with the office of the United States Attorney for the Southern District of New York upon learning that the U.S. Attorney's office is reviewing the company's stock option grants," based on company statements. Add this to the SEC's official investigation revealed just recently and RIM's more under the microscope than a high-school biology experiment. So far, company co-founder Jim Balsillie has stepped down from the company's board of directors but is retaining his co-CEO title at this time.