2002 Chrysler Sebring Sedan LX 2.7 v6 Noise?

[leadpaint]

Hello,
I have a 2002 Chrysler Sebring Sedan LX with the 2.7 V6 engine, 50,000 km (31,000 mi). I have recently heard this noise from the front end of the car when reaching and maintaining any speed above about 55 km/h (35 mph). It is a (not too loud) wobbling noise that immediately stops when I remove my foot from the gas pedal. (therefore, it cannot be noise from the tires) When I re-apply my foot to the gas pedal to maintain the speed, I hear the noise again. It seems to be louder when accelerating, and non-existent when coasting. Also, it is speed-dependant (ie. the frequency of the wobble is faster when going at faster speeds). However, some days it is more obvious then others.
--> Any ideas?

lp.