Emulation is Free Game

"The Library of Congress has recently granted copyright exemptions in the Digital Millenium Act to obsolete games. The exemption applies to games that require the original hardware as a condition of access, and if the game is “no longer manufactured or reasonably available in the commercial marketplace.” This means that old, unsupported PC, console and arcade games will now be legal to own (so your illegal copy of Mame roms are now legit). The only muddy side is if publishers consider their old games to be “reasonably available” and plan to release classic games as bundles or bonuses, then the copyright protection still stands."

Neowin.net - Emulation is Free Game