Our friends at Computational Culture, a journal of software studies - a brand new an online open-access peer-reviewed journal for software studies work - made this very useful list of other open access journals and publishers for new media studies and related fields:
Follow this link to the list with links:
http://computationalculture.net/?p=165
And here are the names on the list:
C-Theory
Culture Machine
Digital Culture and Education
Digital Studies
Eludamos
First Monday
Fibreculture Journal
Games Studies
Hyperrhiz
Inflexions
International Journal of Communication
Journal of Digital Information
Noema
Open Humanities Alliance
Open Humanities Press
Public Library of Science
Transformations
Vague Terrain