I just noticed that all the files on mysongbook.com are no longer available for download due to legal issues. Apparently the Music Publishers' Association (MPA) has decided to take legal action against sites providing free tabs. Free tabs, and programs like guitarpro are good learning tools for aspiring guitarists, and IMO the MPA is doing this out of greed.
The tabs provided are interpretations of songs, made by ear, not copies. What will their next action be? Make it illegal to do covers? Maybe you'd have to pay royalties when you purchase a guitar?