What Is This So-called iPhone 4 "Game Grip" For Exactly?

Has anyone used a such a stuff as a "gaming grip"? I learned this name yesterday when I found a so-called one (http://www.tinydeal.com/gaming-contr...i--p-7878.html) for iPhone 4. I guessed it was an extra controller at the very beginning, but didn't find any button on it. Then I thought it was a rack, but i cannot see how to play game with it. So is there anyone to tell me about the grip? I am really interested in it.

I have no clue what it's like. But I will NOT get it if it only comes in pink.

I had something similar for my PSP and I liked it a lot for long gaming sessions.

Can you say ugly? I can.

Give This a look see, i have one, works pretty good.

http://www.engadget.com/2010/05/31/p...w-available-a/

It does not have any buttons, its just a grip

It looks like it would be better for people with large hands, who probably encounter clutter or squished together hands when holding their device normally.