For a year, Hewlett Packard’s spies collected information about Pui-Wing Tam, a reporter in the Wall Street Journal’s San Francisco Bureau. They collected her home trash, set up an online account with AT&T to see who she was calling, photographed her in public, recorded her voice mails, and investigated her husband. They even know when and where they were engaged. The extent of HP’s spying was revealed to Tam yesterday, who wrote this first-person piece in today’s edition. Even with these extraordinary explanations, Tam doesn’t believe the company has fully disclosed the extent of her spying — she found some holes HP’s story.