Jeremy Sigel, client director, mobile at digital agency Essence, discusses the future of mobile marketing for companies such as Apple, Google, Twitter and Facebook. Sigel is currently spearheading Google’s mobile marketing efforts in North America to promote the company’s products and services. In addition, Sigel is an entrepreneur and founded 11:11Wish, a free iPhone app that allows users to send personalized wishes to friends on Facebook and Twitter delivered at exactly 11:11 a.m. or p.m.