New in Columns: Marilynne Robinson, '68, '77, has a gift of exploring characters' lives that has made her one of the great fiction writers of our time; if you take Hanson Hosein's class in digital media communication, you better show up to class ready to use e-mail, Twitter, podcasts, blogs, laptop computer and cell phone; The Washington Park Arboretum, one of the Pacific Northwest's public gardens, celebrates its 75th anniversary this fall with a stunning array of flowers and plants.