More on Transsexual Marriage Rights
http://arizonaabby.wordpress.com/2008/07/24/more-on-transsexual-marriage-rights/7/24/2008
The best chart I know of on LGBT rights in the U.S. is EqualityGiving's State of Equality Scorecard, which includes same sex marriage. It does not, however, deal with the question of the validity of marriages by transsexuals, whether they transition before or after marriage. Lambda Legal, NCLR and NCTE may have charts or other information specific to transsexuals.
