I've been running a personal blog of my own (in a style of firstnamelastname.com) concentrating on my music hobby and for a year and a half now I've been publishing some tutorial articles there as well alongside my song demos. I'm getting ok traffic every day via Google for those tutorial articles and I've been ranking high for one specific search term for a several months now. However, I'm going to make my blog a bit more tutorial/music tech news oriented and I was planning to move it on a new domain name. What happens to my rankings if I change my domain name? What happens to the juice of various backlinks that are pointing to my blog?