Seems like RG2, D17, and C6 are all warm. I have one of the newer raspberry pi's made in China, so I'm not surprised if the board is faulty.
Also I've heard that RG2 gives 1/3 of its energy off as heat, so the other components may just be hot do to the radiating warmth. Does every pi get at least some heat in the RG2 area? Also I've tried my pi with an unpowered USB hub (I unplugged the transformer that went into powered USB hub) and got the same results.
RG2 does get hot, as will any linear regulator. Yes, it's discarding 1/3 of its input power as heat. Some of that heat is radiated through its case, but I think most of it conducts to the PC board so it warms up all components in the immediate area.
How hot does C6 get? If it's just warm, i.e., you can leave your finger on it indefinitely, no problem. If it's hot, e.g., you have to take your finger away in less than 2 seconds, it could be a problem. If an electrolytic capacitor gets hot its electrolyte boils away and the capacitor either becomes an open circuit or shorts out.
A lot depends on what kind of case you have. When I first had my RasPi, it was sitting on an anti-static bag. There was no air flow underneath and the back side got very hot. I now mount my RasPi vertically, so there's passive air flow on both sides and it runs at most warm.
There are some nice thermal images of a RasPi model B rev 1.0 at this Spanish site: http://www.geektopia.es/es/technology/2 ... iento.html
The images are color-coded, and you can see that RG2 gets quite hot. There's a Celsius temperature scale on the side of most images. C6 gets warm. It's not hot like RG2 (which may burn your finger-tip after a second or two) or really hot like the LAN9512 (rev 1.0 had a PCB error that caused some LAN chips to run much hotter than they do on rev 2.0). However, C6 does get warmer than most of the connectors.