I saw this thread and had to register, cause I just found a pretty nice grip for my 7D. It's available on eBay and Amazon. It's called a Vertax, manufactured by Pixel (www.pixelhk.com
). It is much better than the original BG-E7 in two ways: (1) They followed the design of the BG-E9 grip for the Canon 60D, in which the batteries load from the side, not the back, allowing for a much nicer, tapered area for your fingers to hold on. The BG-E7, on the other hand, is very square and blocky, and is uncomfortable to hold. (2) The power button is a slider button accessible with your thumb without releasing the camera. This is a nice improvement over the original, which forces you to hold the camera in your left hand and pinch the button with your right hand.
The down side: The only thing they failed to do is add some curvature on the left side of the grip to be flush with the 7D camera body. They have other models that do this; why they didn't do it on this model defies logic. So on right, where you hold it, it looks fine, like the original. But to the left, it looks like it's sitting on a flat shelf.
Overall, though, I still recommend it, just because of the improved ergonomics. It's also quite light.