One of my favorite computer-ey movies of all time is Sneakers. If there's any of you out there that haven't seen this movie, go rent it today. Better yet, pay the $10 to add it to your collection. There's some great things, like phone phreaking by blind character, because his hearing is sophisticated enough to discern tones. The idea of tracing a trace on you in real time (something I believe is impossible, but I won't swear to it). Defeating the man-trap security system (which actually exists and was featured on an episode of MythBusters not that long ago). And, of course, the device that drives the plot is one that will decrypt anything. Fun flick. I always thought the ending scenes with Ben Kingsley and Robert Redford were outstanding.