you must set these meters to "Stay Topmost" before dragging them onto the taskbar!

To do this right click on the meter choose settings
then postion then select Stay Topmost

if they get trapped under the taskbar for whatever reason
you will need to set your taskbar to to "Auto Hide" then 
you will be able to drag them up onto the desktop and change the postion setting

the font used is Geo Sans Light:
http://www.dafont.com/geo-sans-light.font