It's a cube. The only challenging element here is that it's seated off-axis. I'm amazed that such a simple translation of form has provoked such markedly vehement negative responses from a certain cross-section.
Again, I think this is probably evidence that Boxee has targeted a very specific market segment. I doubt they're interested in appealing to "sensible female spouses" - those people already have an entertainment center and are signed up for netflix or blockbuster by snail mail.
I'd encourage all the folks immediately tempted to rage on the design of this device to take a step back and realize that if their first reaction upon seeing it is violent revulsion and nausea, it's probably wasn't intended for them in the first place.
Think about the market segment who, in recent history, has dominated CD purchases and what this device might mean as a distribution system targeted at them - but for tv, film, etc.