Speed for Maps overlays the speedometer over the map interface in a way that is unobtrusive and almost feels like it belongs.
You can grab the app now from Cydia on your Jailbroken iOS device right now. Once installed, you can specify the units of measurement you want your speedometer to display. The options include miles, feet, kilometres, meters and knots.
To the crafty, thoughtful developer(s) who created this Cydia tweak, we say to you: “Well played, sir.. Well played.”