IPhone :: 4 Getting Very Hot On Bottom Right?

i'm not trying to diss Apple even further as i am too a bit peeved that my iPhone suffers from the drop in 3G reception when holding the phone in the exact way i have holded every phone including my first Motorolla. You have to partially hold the bottom left even if it's just with your pinky finger under the bottom, to stop it slipping out of your hand. Why they just didnt include this areial at the top, who knows!?

Anyhow i noticed whilst doing speed tests and then looking for some wallpapers using safari (maybe 20mins continues use, max!) that the right hand side at the bottom, just bellow where the sim tray is seems to be getting very hot. Is this close to where the A4 chip is situated? I noticed to the touch with my finger it getting warm and also (how scientific this was) i rested the metal above my top lip to see how warm it was (as this area is more sensative) and clearly found that this small area was much hotter than everywhere else on the phone. Leaving it a further 5 mins on standby it seems to have decipited all the heat and is same temp all round again.

My only concern at this early stage is, what if i was using the internet for a longer period of time? Can anyone else confirm that this also does it on their iPhone 4's just to make sure it's not just mine. As i am wanting to fully test my iPhone before i go on holiday in a weeks time.