Does Dust Lead to Dirt?

The question as to whether we are alone in the universe depends on whether we can find planets that are similar to Earth. One such planet was discovered recently as the fifth planet around the star Fomalhaut. The planet designated as Fomalhaut-b finds itself in a solar system similar to our own. It lies alone the green zone that has been used as a region where such planets might be able to sustain life.

This system was found while searching a dust line in this region of the galaxy. (http://hubblesite.org/newscenter/archive/releases/2008/2008/39/full/)
Apparently, the best place to look for exoplanets is to follow the dust rings that line many of the galaxies. Fomalhaut-b is one such planet discovered along a dust line similar to the Kuiper Belt around our solar system. For exoplanet hunters, the best way to find something is to "follow the dust", according to Mark Clampton of NASA's Goddard Space Flight Center. Star Fomalhaut seems to distort some to the dust along the dust line. The question I would ask, is if some of the material used to form these systems comes from this dust?

In the case of Fomalhaut, the dust was being gravitationally modified by a planet lying between the dust ring and the star, according to Hubble astronomer Paul Kalas of the University of California at Berkley (2005). Therefore, the hunt for exoplanets along dust rings may prove fruitful along with the use of new Dobbler gathering instrumentation. With slight back and forth changes in a star's wavelength due to the Dobbler shifts that might signify an orbit of a planet, and the location of this star near a dust line, the chances for the discovery of new planets are greatly increased.