Sure, you could look at it as crass commercialism, but we choose to see the softer, gentler side of Buffalo in this act of kindness: buy a new SSD upgrade for your ASUS Eee PC 901-16G
and Buffalo will toss in a free chassis to hold your existing 16GB drive. The 32GB and 64GB drives will run you $129 and $228, respectively, and actually ship inside the external drive -- you don't have to swap SSDs if you don't want to, but we like the option. We would, anyways, if we lived in Japan.
Buffalo's external 32GB and 64GB SSDs for Eee PC