pic: Wheel Idea 2

[DonRotolo]

As far as cool looks, it's a winner.
As far as manufacturability and efficiency, it could be further optimized:
1. Hex holes must be broached, round ones can be drilled. Unless you require a hexagonal hole, use round. (But, those hex holes in the spokes DO look cool)
2. The ring surrounding the axle area (that has those oblong slots in it) serves lettle purpose aside from adding weight. To understand why, imagine the metal 'spoke' if that ring wasn't there - it would go from the central hub to the outer rim. The ring might be distributing forces very slightly across the spokes, but not enough to make any difference. Instead beef up the center hub a little bit (thinnest area about 3/8-1/2 inch) and lengthen the spokes to fit.
3. Ease the edges of the spokes a bit.