Just came across this very good documentary that shows the growth and subsequent overexposure of the Seattle scene in the early 90s.   From Wiki: Hype! (1996) is a documentary directed by Doug Pray about the popularity of grunge rock in the early to mid-1990s United States. It incorporates interviews and rare concert footage to trace the development of the grunge scene from its early beginning in neighborhood basements to its emergence as an explosive pop culture phenomenon. Hype!