Two years ago, The Melancholy of Suzumiya Haruhi bounded across my radar screen. I watched all the fansubs and read some of a Haruhi Japanese novel as soon as I could.
I was vastly impressed with the depth of story and the metaphysical questions engaged in this shojo series.
Yappari, it’s caught on greatly, including people imitating the dance moves found in the opening sequence. To see the extent, here’s a story about Haruhi Day 2008. (I gather it is at one of the NYC Kinokuniya Locations.)