By Lenn Thompson Over the last two weeks, Shinn Estate Vineyards has done something that no one else has on Long Island — harvest their first 100% organically grown grapes — their first year working towards organic certification. Pictured at right is co-owner and vineyard manager Barbara Shinn holding a lug of just-picked sauvignon blanc for a wine they call "Haven." According to her husband, David Page, the grapes were "Field blended with 15% semillon, and are now on extended skin contact in refrigerated press. They will get pressed after 48-72 hours. Brix is 23.6. pH is 3.35. 2.81 tons…