Unfortunately, Adafruit is out of stock on the Bluefruit EZ-Key and has been for some time. Apparently they are redesigning it. However, according to comments from an Adafruit employee in the forums, it might not be available for a long time due to problems sourcing the components. Too bad, since it is really the perfect device for any kind of wireless HID project.
I’ve been working on a DIY wireless jog pendant for the past few days. I hope I’ll be ready to post the finished project by next weekend.