I have a 1997 Nissan Altima that I love.  Unfortunately, I will get a
high pitched squeak/squeal on the driver side front when the car
exceeds 20mph.  Sometimes turning the wheel stops the noise, and
sometimes (rarely) there is NO noise.  But once it starts, it's
generally pretty loud until I decelerate to about 10 mph at which point
it ceases.  I thought it was a bearing problem, but it's not
necessarily a constant.  I'm not sure what might be causing it.  Any
help on this subject would be greatly appreciated.

Thanks,
Brian