Quantity   Component name
1 × 6S Lithium Battery Get the long and flat version. Links in the project blog post.
1 × Some kind of microcontroller Arduino Uno works fine, but it's a little bulky.
1 × Brushless Outrunner Motor One with a low kv value. Mine was 149kv. Bought from Hobbywing
1 × Wireless Wii Nunchuck
1 × Skateboard deck Longboards are, well, longer, which means you can fit more components easily.
1 × ESC (Electronic Speed Controller)