3 Pingus is a screenlet that displays your current CPU temperature and more.
I hacked the CPUMeter, tmeperature2 to make them work with dual-core and made tux-themes for them.
I also made an new version of the wireless screenlet.
tempertaurePingu needs lm-sensors and hddtemp working
Screenlets is the name of both a set of independently-developed widget applications and the widget engine which runs them. The engine runs primarily on X11-based compositing window managers, most notably the Compiz (under Linux) architecture.
extract to /usr/local/share/screenlets