Dr Christina Higgins is an Assistant Professor in the Department of Second Language Studies at the University of Hawaii at Manoa, where she teaches courses in sociolinguistics, discourse analysis, and intercultural communication. Her recent research has focused on communication in NGO-sponsored HIV/AIDS prevention and awareness education in Tanzania, where she has investigated the discursive construction of local and global worldviews. In her book, English as a local language: Post-colonial identities and multilingual practices (Multilingual Matters), she has also explored the role of language and popular culture in HIV/AIDS awareness efforts in hip hop lyrics and in public health advertisements. Her website can be found at http: //www2.hawaii.edu/ cmhiggin.

Dr Bonny Norton is Professor and Distinguished University Scholar in the Department of Language and Literacy Education, University of British Columbia, Canada. Her award-winning research addresses identity and language learning, education and international development, and critical literacy. Her current research investigates the use of innovative technology to promote multilingual literacy in sub-Saharan Africa. Recent publications include Identity and Language Learning (Longman/Pearson, 2000); Critical Pedagogies and Language Learning (Cambridge University Press, 2004, w. K. Toohey); and Gender and English Language Learners (TESOL, 2004, w. A. Pavlenko). Her website can be found at http: //lerc.educ.ubc.ca/fac/norton/.