I am sorry that I managed to miss this journal, until recently:

The International Journal of Internet Science (IJIS)
This journal combines Internet Science with Open Access. Conduct your research on the Internet, study the Internet, and make the papers with your results freely available on the Internet via this journal.

A peer reviewed open access journal for empirical findings, methodology, and theory of social and behavioral science concerning the Internet and its implications for individuals, social groups, organizations, and society.

The current rejection rate for articles submitted to this journal is 77%.