I heard about the initiative last year at Music & Gesture 2 in Manchester, and now I see that the new online journal Music Performance Research is actually up and running.
Music Performance Research is an international peer-reviewed journal that disseminates theoretical and empirical research on the performance of music. Its purpose is to disseminate research on the nature of music performance from both theoretical and empirical perspectives. The journal publishes contributions from all disciplines that are relevant to music performance, including archaeology, cultural studies, composition, computer science, education, ethnomusicology, history, medicine, music theory and analysis, musicology, philosophy, physics, psychology, neuroscience and sociology. […]
Sounds like a place where I should consider submitting a manuscript.