The Leap Motion controller is currently present in three forms: a $74.99 standalone dongle, inside the special edition HP Envy 17 laptop and inside an HP keyboard. The dongle -- with almost half a million units sold since launch -- and the keyboard are obviously the only ways to add this hand motion sensor externally, but the latter option was limited to select HP computers to begin with. Well, not any more. At Computex, Leap Motion told Engadget that as of this month, you'll be able to purchase said keyboard for about $99, and it'll work on any Windows 7 or Windows 8 PC as long as you have the software installed -- be it the current version or the free V2 update with skeletal tracking coming this summer.