The impact of demographics, media experience, media richness perception, and national culture on media preferences are examined to assess the users' preferences for instant messaging (IM) compared to other traditional and new communication media, face-to-face, telephone, email, and short messaging service (SMS) in two distinct cultures, Australia and China. Email is clustered with face-to-face and telephone as the most preferred media for any communication activity, while IM and SMS are clustered together and are the least preferred media for communication.