I found a very useful freeware app called
'Speedfan'. It monitors all your temps (CPU, mobo,etc) and fan speeds via the mobo on-board sensors, and can even assist in overclocking.
All details can be found here:
http://www.almico.com/speedfan.phpI'm using it now, and I've found its actually quite better than the 'Asusprobe' program which was supplied with my motherboard. It can be used with almost any current motherboard from the major brands.
Check it out and tell me what you think.