After 3 hours of flash/HD video on my chest in bed, my Macbook hits 180F (82C) and starts throttling the CPU. Then I have to take it off my chest and stick it in front of the fan.
MY Envy 14 is on the way. Can't wait for the performance increase and lower temps. Also gonna get a lapdesk.
My MacBook is now at 110F running Safari, but that is with it on my desk with a small fan a foot away. It's so hot here in the summer there is no way to keep my place at 72 without paying the power company $300.00 a month, so I keep the thermostat set at 80 during June-August and always keep a small fan near the computer during that time just to circulate some air. Makes a big difference in temperature. When I'm away from the desk with it, the MacBook temps are much higher, but I use it 90% of the time as a desktop.