When was the last time you posted a pic on PhotoBucket? Did a search on AltaVista? Or updated your Myspace page? In the online world, sites that were once the rage can quickly fall out of fashion. But they don’t die; they linger on in a kind of cyber-limbo. Here are 10 sites that you may have forgotten about, but they’re hanging on, and in some cases they might be poised to make a comeback.