CNET is selecting their 100 favorite iPhone apps in 10 installments. Starting today, each day for the next 10 business days CNET writers and bloggers will take turns identifying their 10 favorite apps. Today's first installment is by Kent German, senior editor at CNET Reviews. The 10 selections are presented in slide-show fashion. Among his favorites is Photoshop.com Mobile, the free photo editing app.