You might not want to throw away that $5000 Mac Pro/Adobe CS4 rig just yet, but this story makes it seem like that one day might be an option. Jorge Colombo drew this week’s New Yorker magazine cover using Brushes (iTunes store link), an application for the iPhone, while standing for an hour outside Madame Tussaud’s Wax Museum in Times Square. Passers-by just assumed he was checking his email.