OneShirtChris writes "I'm an audiofile, more specifically a metalhead, and I have an extensive library of small bands, demos, EPs, and many big albums as well (all legally purchased of course). I'm wondering if there is an easy way to sync my library across all of my machines. I run Vista Ultimate 64-bit at home (for gaming, don't judge me), Gentoo amd64 at work, and Mac OSX Intel on travel. Rsync is out of the question because my work blocks it. What would the slashdot crowd recommend in a solution?"