In an age of mass production where millions carry iPhones, people seek a more personalized look to their cell phones with more unusual covers. Creative souls can now do artistic customizations with sketchpad iPhone covers from Trexta.

The stage is set: An auditorium in IBM Research's headquarters in Yorktown Heights, N.Y., has been transformed into a stage for the IBM Jeopardy Challenge this weekend, which pits Jeopardy champions Brad Rutter and Ken Jennings against Watson, a computer with the ability to process complex language queries.