Seconding this, anything under 100 is acceptable, but in general i'd say 50-80 should be a safe norm.
Hell, my old card would shut off as soon as it went over 100.
One thing i find helps a lot on desktops (sorry, know you're on a laptop), is to move any PCI cards 1 slot down away from your graphics (pci-e/agp) slot, and leave the backplate for that slot uncovered to improve air flow.
For a laptop... maybe get a cooling mat thing with one of those fans in.
Also, as a slight deviation on topic: Do system temps show up in C or F in the US?
I use evga precision to monitor GPU temps, and I get mine in degrees Celsius.
I have a Gateway P-7811 FX laptop. It used to run at 95C when playing this game on high gfx settings (I have an nVidia 9800 GTS mobile gfx card), but that would cause the left edge of the laptop, as well as some of the left-most keys, to be extremely hot--sometimes almost too hot to comfortable touch. This was unacceptable, and a clear sign of excess heat, so I got a laptop cooler (zalman nc2000, amazing cooler) and my game now runs at below 70C. I always keep my laptop/cooler combo on a hard surface.
Of course, always check your safe operating temperatures for your given equipment, but remember that the more heat your laptop produces, the faster it's going to wear out. Even if your laptop is running at "safe" temperatures, cooling it better is only going to make it last longer.