Memorial day is 05/25/2015 – Orders will ship out on May 26th. There will not be any deliveries or shipping on Monday. Any order placed after 11am ET on Friday May 22nd will not start to ship out until Tuesday May 26th.
The BeagleBone is a 3.3v board, vs. 5v for most Arduinos. Any sensors that can operate at 3.3v can be used directly. 5v only sensors will need some sort of level converter such as this one: http://www.adafruit.com/products/395