The City of Houston has put together a somewhat nifty little website showing much of the municipal art that's scattered around town.You can look up items by neighborhood, and even by zip code.Want to know about Ladder of Hope, the Floyd Newsum sculpture hanging in the Acres Homes Multi-Service Center? You can do it here.That strange totem pole near Sunset Boulevard and Rice? Read all about it here.Minette Boesel, the mayor's assistant for cultural affairs, tells Hair Balls that about 120 items a