DEVIN McKINNEY  •  Thinking about favorite unreleased Beatles songs, my mind, like most people's, went right for the studio outtakes. But I was walking across town yesterday with iPod in ears and shuffled right into George's BBC rendition of "I Forgot to Remember to Forget," one of the songs recorded by Elvis Presley at the legendary Sun Sessions. Elvis's version is lachrymose, a tear-in-beer downer to break up the honky-tonk monotony. But the Beatles do it light, and light, it turns out, is right. George tosses off the lost-love lyric with the callow elan of a boy skipping through mud puddles: he's [...]