From Paul Tinkerhess, organizer:
The 2012 Water Hill Music Fest is set to happen Sunday, May 6th, from 2 to 6 p.m. (rain date May 13th). All residents of Ann Arbor's Water Hill neighborhood are invited to play music on their front porches during this unique celebration. Expectations are high this year after thousands of visitors attended last year's inaugural event.
From last year's event, as documented by Michigan Radio: