From the Seattle Post-Intelligencer:
PERRY TO DETROIT: Sonics assistant general manager Scott Perry has accepted an offer to be vice president of basketball operations for the Detroit Pistons, his former organization. Perry spent seven seasons with Detroit, one as a college scout.
Perry replaces longtime Pistons executive John Hammonds, who took the Bucks GM position.
More confirmation from the Tacoma News Tribune:
Seattle assistant general manager Scott Perry is expected to be named today as vice president of basketball operations for the Detroit Pistons.
Seattle GM Sam Presti gave the Pistons permission to talk to Perry earlier this week. Perry worked in Detroit’s front office as director of player personnel before he took the job with Seattle last summer. Perry’s wife, Kim, and 13-year-old daughter, Chelsea, still live in the Detroit area.
I haven't seen anything in the way of an official announcement, but this news has been expected all week.