This is the first hand info I got from http://kleptography.com/rf/:
- Grip is individually 3D CNC machined from solid aircraft grade aluminum alloy then glass bead blasted, black anodized and nickel sealed – makes one handed shooting a breeze.
- It does not obscure battery/card door.
- Grip is attached with transparent VHB (Very High Bond) 3M tape. Bonding power is exceptional but it can be carefully removed without damaging finish of the cam if needed.
- Projected retail price is $29.95 + $3.00 S&H ($4.50 outside US), availability by end of April.
Here are some pictures (click for high-res):