From the AP via
Yahoo:
Federal officials arrested more than 300 illegal workers at 61 Wal-Mart stores across the country early Thursday morning and searched the Bentonville, Ark., office of one of the retail chain's corporate executives.
The workers arrested were members of cleaning crews which the company hired through a contractor. All were people in the country illegally, said a federal official on condition of anonymity.
No word on whether the Wal-Mart Smiley Face was one of the ones arrested.