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We present 3-160 micron photometry obtained with the IRAC and MIPSinstruments for the first five targets from the Spitzer Legacy Science Program"Formation and Evolution of Planetary Systems" and 4-35 micronspectro-photometry obtained with the IRS for two sources. We discuss in detailour observations of the debris disks surrounding HD 105 (G0V, 30 +- 10 Myr) andHD 150706 (G3V, ~ 700 +- 300 Myr). For HD 105, possible interpretations includelarge bodies clearing the dust inside of 45 AU or a reservoir of gas capable ofsculpting the dust distribution. The disk surrounding HD 150706 also exhibitsevidence of a large inner hole in its dust distribution. Of the four surveytargets without previously detected IR excess, spanning ages 30 Myr to 3 Gyr,the new detection of excess in just one system of intermediate age suggests avariety of initial conditions or divergent evolutionary paths for debris disksystems orbiting solar-type stars.Comment: Six postscript pages with one additional PDF file. To appear in the  ApJ Supplement, Vol. 154, Spitzer Special Issue, September, 200

The Formation and Evolution of Planetary Systems: First Results from a Spitzer Legacy Science Program