It's almost certainly a matter of time before the subject of this post is struck down with an Activision-branded cease and desist, so listen up: Using a bit of sorcery, Sarien.net has made its catalog of Sierra On-Line adventure games (including hits like Space Quest, King's Quest and Leisure Suit Larry) playable on the iPad. To access the games, just visit Sarien's website, pick your game and bookmark it. It's alarmingly easy.
Again, we can't imagine Activision smiles upon any of its IPs being distributed so freely and simply, so the games probably won't be available for long. We suggest you get to perp-busting/galaxy-saving/womanizing at your earliest convenience.