1. Is your phone going into sleep mode? Use an app called CPU Spy to find out. It seems that your phone is not going into deep sleep, or something is running in the background.2. I recommend Temp+CPU V2. It's a decent widget.Off topic.There are so many threads on xda about rooting your phone. I rooted my phone with stock recovery using the latest PhilZ-cwm6...... It took a 1 min to flash it. It doesn't increase your triange count, which is why I did it this way.And, yes, rooting WILL void your warranty...but only if you get caught.