Just ordered this, and now I can't wait to try it out :D
http://www.lovehoney.co.uk/product.cfm?p=31953
Been wanting a bigger gag anyway, and this way I get that, get to try the clamps, and can have the clamps tugged at through normal motions :D :D
my OH loves having her nipples played with, I on the other and dont enjoy it as much as she does when its my nipples. mine just get very painfull unless she isnibbling/licking/kishing them. So basically anything thats not too rough
Oh wow. So, my gag with clamps arrived today. It's going to take some getting used to, and the clamps have a tendancy to slip off at the moment, but I like!! 
My Miss loves to use clamps ( http://www.lovehoney.co.uk/product.cfm?p=1769 )on my (male) nipples, I often have to wear them for hours under lingerie. Wish we could find some pretty nipple clasps that would stay on, obviosly they are designed for larger female nipples
I deffo love having my nipples played with !! I get more aroused than probably receiving oral, strange I know but I just love it. Compared to my OH my nipples are soo sensitive, I could probably orgasm through nipple stimulation alone.