An alumide Shapeways model I had made a month or so ago:
This is an alumide model of a part that I've gotten quoted in DMLS a few times recently. This part probably wouldn't be printed in its current design - at least as anything other than an exercise in showing that it's possible. The shape simply isn't optimized for additive manufacturing, and it would take a lot of re-imagination in order to change that.
Still, it's a start - and because of its volume/mass ratio, it would be an interesting part to explore deeper.