Via Paul Crowe at the Kneeslider, I’ve learned about a new iPhone app that serves as a digital dashboard for your 2001+ Harley-Davidson motorcycle with EFI.
A connector hooks up the ECU to your iPhone. The phone, mounted on the handlebars, can then display a speedometer, tach, engine temperature, signal indicators, and gear indicator.
Sadly, new 2011 Softails have a different ECU connector, so the phone can’t be hooked up to them. For other Harleys, however, the app is available for CDN$250.