Thanks to sarasnavel, who corrected one of my citations in my blog post “Surgeonocracy,” I found a lot of new legal resources dealing with trans*people:

Transgender Law and Policy Institute
http://www.transgenderlaw.org/index.htm

The Williams Institute, a think tank at the UCLA School of Law (the whole thing, but especially the publication section on Gender Identity Issues Studies:
http://www.law.ucla.edu/williamsinstitute/publications/Policy-GenderIdentity-index.html, which includes an excellent article by Dean Spade about the legal complexities involving legal sex and name changes.

Sexuality, Gender, and the Law: National and International Bibliography. University of Chicago.
http://www2.lib.uchicago.edu/~llou/sexlaw.html

Sexual Orientation, Gender Identity & the Law: A Research Guide. University of Tulsa.
http://www.law.utulsa.edu/library/research/pathfinders/so

Sexual Orientation, Gender Identity and International Human Rights Law (special issue of the journal Human Rights Law Review Online)
http://hrlr.oxfordjournals.org/cgi/reprint/8/2/207

The Association of American Law Schools, Section on Sexual Orientation and Gender Identity Issues
http://www.aals.org/services_sections_gl.php