Christian Gurney, CEO and co-founder of Torsion Mobile, will speak at the Business Innovation Zone's luncheon May 15. Gurney will talk about what his company did when it found that its business plan for a premier product wasn't working. The event, from 11:30 a.m. to 1 p.m. at the Greater Des Moines Partnership, 700 Locust St., costs $15. To register, click here.