Amazon has just made a whole lot of Kindle DX owners-to-be very happy campers. Back when the super-sized e-book/e-magazine/e-newspaper/e-text book reader was announced, “Summer” was as close as we got to a release date. Pre-orders were open of course so that anxious e-bookers could reserve their spot in line, but Summer can be a pretty long season — you know, global warming and all. Amazon has just made the Kindle DX ship date official however, June 10th to be exact, so the mystery is over. Those of you who were quick to throw down $489 on a pre-order will likely receive your DX shortly after the 10th and orders are first come, first served. Translation: if you haven’t gotten your order in at this point, expect Hartsfield-Jackson style delays.