OOOMS is selling wooden USB memory sticks.
From the product page:
The sticks are picked from the woods and are manually selected on their natural beauty, professionally handmade into unique and personal USB memory sticks.
They would go well with these wooden computers.
You can order them (PayPal, worldwide delivery @ 7 EUR) starting at 45 EUR for 256 MB, up to 80 EUR for a 2 GB model.
It’s funny how the product description has the dimensions at approx. 2 x 2 x 10 cm. I guess it depends on which piece of wood you get!
Link via Gizmodo