Busyhot is a small Gnome panel applet which displays CPU load and temperatures in real time – direct on your panel.
The applet has support for up to 8 cores with a simply click on the applet revealing per-CPU percentages.
It’s a useful tool in particular for overclockers who need to keep an eye on processor temperature.
Download .debs for for busyhot @ http://kornelix.squarespace.com/packages/
Once installed right click on your panel, select ‘Add to panel...’ and choose ‘Busyhot’.