chlorine boils off. it will also gas out overnight, or faster if you use something like an aquarium pump.
chloramine does not boil off or gas off. campden will.
however, my tap water is treated with chloramine, and I have no issues with my beers, neither with fermentation nor off flavors in the finished product.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10