Open Access. The Published version of this work has been reproduced here in accordance with the Publisher's self archiving and copyright policies.
This article may be downloaded for personal use only. Any other use requires prior permission of Duke University Press. The following article appeared in Social Text, v. 22 (1 78), 2004. p. 85-101 and may be found at http://dx.doi.org/10.1215/01642472-22-1_78-85