No matter how many iPads we buy and tweets we send, it seems that retro soul will never die. I make this assertion partly on that Heineken "Love Letter" commercial, the one that plays after every other ad during the U.S. Open this year. (Don't get me started on the "It's a monkey, Daddy" Federer commercial, which was cute the first ten times and not so cute 500 airings later. I've obviously been watching too much tennis.)