Check out Grand Rapid's local homebrew club.  www.primetimebrewers.com
Check out New Holland Brewing Company's Homepage.  www.newhollandbrew.com
Check out Saugatuck Brewing Company's Homepage.
www.sbrewing.com
Siciliano's Market in Grand Rapids has all your homebrewing supplies.  www.sicilianosmkt.com
American Hombrewers Association.
www.beertown.org