I think DJ Danger Mouse’s “The Grey Album” is really what brought the term mash-up to the masses. The idea of mixing and matching sound bites and guitar rifts is nothing new, but to do it in a fashion that is more refined than can be found on the turntables yet still gritty enough not to be mistaken for a record label produced piece is what draws people to these modern mix tapes. Combining mashups with my favorite non-profit, The Creative Commons, Splice offers a unique and completely legal way to produce, share, and use music. Every piece on the site is licenced under CC which means that you are free to use it in your homemade videos, movies, or even video games. If you are an aspiring musician yourself, you can use the online sequencer to create your next masterpiece. There is a heavy communal element to the site with forums, blogs, contests, and profiles. Take a moment to check it out!