I have generally refrained from book, movie, essay, and article reviews and such-like activities on this blog, but I just finished watching this movie and can't really hold back my enthusiasm.
The title (down at the bottom) says: ssaibogeu-jiman kwaench'ana, which means "I'm a cyborg, but that's ok." The tagline there in the middle says "k'iseuga anirayo, ch'ungcheonindeyo," which means "it's not a kiss, it's an electric charge." While I do have to admit that sounds really corny, and though both of these actors are famous for films and music I'm inclined to disrespect without knowing anything about, the movie is really fantastic. It's visually arresting - there are even some amazing gun/bloodshed sequences - but in a way that compliments the film, not in a (coughTRANSFORMERScoughD-WARcough) way that makes it look like the director and screenwriter had nothing better to do with their time or brains...
The basic story is about an otherwise normal girl sent to the loony bin because she believes she's a cyborg. She enters a community of quirky - though not insultingly so - mental patients, all of whom interact in quite interesting ways. She's eventually befriended by a young man who has convinced himself, and the other patients, that he can steal intangible objects (eg "your politeness" and "thursday") as well as he can steal other things. I won't give any more plot spoilers here; I'll just say the movie delivers some nice messages without feeling preachy (the director, Chan-Wook Park, is known as one of Korea's best and has done well at various local and international film festivals), is subtly very funny, and is quite beautiful to watch.
I don't know if you can find the movie at a blockbuster, though there's a chance, since it did well in festivals in Germany and Japan. I checked, though, and you can find a torrent on mininova if you search. And a (korean)trailer here.