I've wished there was a way to view the current temperature on my HomeScreen. Especially in our cold winters. Up till now the only way was with a jailbroken iPhone. Now its possible without jailbreak.
Damaged or broken motor mounts are arguably the most serious cause of engine vibration. CarsDirect.com suggests that a driver shift between drive and neutral while the vehicle is sitting still. If the vibration lessens while in neutral, the motor mounts may have sustained damage.
I have experienced the same since spring of 2007 - after negative testing for everything else, I had a positive Western blot test for Lyme disease. Infection with the Lyme bacteria can cause this sort of internal vibration-a type of paresthesia (peripheral nerve sensation).