I’m still recovering from my week and a half stay in Austin, Texas, where I attended South by Southwest (SXSW), an annual mega-conference covering film, online life, and music, of which music is easily my favorite portion. Observers might mistake attendees like myself for people on a music-snob vacation, indulging ourselves with free beer and rocking out to some of the hottest bands in the country. Rest assured, many of us are hard-working cultural critics, imitating the rock-star lifestyle for four long, music-filled days so that we can come back and report on the latest trends, and what’s about to move from the margins to the mainstream. This year, the conclusion is unavoidable: The ’90s are back, in a big way.