Front suspension or wheel vibration increases in pitch as speed increases on 2008 Mazda Mazda3

After being serviced for the power steering assist recall 2 months ago the vibration has developed and become more and more noticeable the more I drive. It does not transmit vibration to the steering wheel, it is non-existant while the car idles and is throttled up or isn't moving. Tires are properly inflated and have only 19,000 miles and don't show excessive wear.

Asked by for the 2008 Mazda Mazda3