This whole global economic crisis, and its resulting massive loss of jobs got us thinking. We here at Engadget didn't want to stand helplessly by, announcing every new round of misery without giving anything back -- so we decided to take the opportunity to spread a little positivity. We'll be handing out a new gadget every day (except for weekends) to lucky readers until we run out of stuff or companies stop sending things. Today we've got two of mophie's Juice Pack Air units, which promise to provide lots of extra iPhone 3G runtime while doubling as a case. Read the rules below (no skimming -- we're omniscie