Working, thanks guys.
For some reason, coretemp always shows 40°C for my CPU (Core2Duo E8500) until it actually goes higher. Weird.
Now here's a more curly one, how to show GPU temp and fan speed in Conky. Obviously I can't just grep "fan1" and "temp1" -
roger@brain:~$ sensors
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +40.0°C (high = +78.0°C, crit = +100.0°C)
Core 1: +40.0°C (high = +78.0°C, crit = +100.0°C)
it8718-isa-0290
Adapter: ISA adapter
in0: +1.07 V (min = +0.00 V, max = +4.08 V)
in1: +1.90 V (min = +0.00 V, max = +4.08 V)
in2: +3.31 V (min = +0.00 V, max = +4.08 V)
+5V: +3.02 V (min = +0.00 V, max = +4.08 V)
in4: +0.03 V (min = +0.00 V, max = +4.08 V)
in5: +0.00 V (min = +0.00 V, max = +4.08 V) ALARM
in6: +0.10 V (min = +0.00 V, max = +4.08 V)
in7: +3.09 V (min = +0.00 V, max = +4.08 V)
Vbat: +3.15 V
fan1: 806 RPM (min = 10 RPM)
fan2: 790 RPM (min = 0 RPM)
fan3: 0 RPM (min = 0 RPM)
fan4: 918 RPM (min = 0 RPM)
temp1: +29.0°C (low = +127.0°C, high = +127.0°C) sensor = thermistor
temp2: +23.0°C (low = +127.0°C, high = +70.0°C) sensor = thermal diode
temp3: -2.0°C (low = +127.0°C, high = +127.0°C) sensor = thermistor
intrusion0: ALARM
nouveau-pci-0100
Adapter: PCI adapter
fan1: 2640 RPM
temp1: +28.0°C (high = +95.0°C, hyst = +3.0°C)
(crit = +105.0°C, hyst = +5.0°C)
(emerg = +135.0°C, hyst = +5.0°C)