A 'HOUSESITTER' LOVE SHRINE

Sexy Dana Delany, who plays architect Steve Martin's hard-to-please squeeze in Housesitter, must be the only person in America not impressed with his dream house. Nestled by a pretty pond in Concord, Mass., it's both snug (1,800 square feet) and architecturally prestigious. The columned porch is classic Yankee farmhouse, the gables evocative of 1800s Greek Revival, the clapboard siding and checkerboard window pattern very ''American Gothic.'' ''It taps a memory bank,'' says architect Debra Wassman, who did the design with husband Jonathan Lanman. And it's available by mail from New York's Trumbull Architects. Why not live out the lifestyle of the rich and fictional?