If you haven't done so already, please do so now (ENDA)
Visit one or more of these sites and send and email to your congressperson.
http://www.nosubstitutes.org/
http://www.unitedenda.org (this site shows the resprestentatives who have sponsored the original bill, H.R. 2015
http://www.kintera.org/c.nlI2IeN1JyE/b.2579775/k.F733/2007_ENDA__Contact_Your_Congressman/siteapps/advocacy/ActionItem.aspx
http://nctequality.org/
You can find the full text of the bill as it was introduced on Apri 24, 2007 here.
And this just in:
OOOH... the only transgender member of a certain big gay organizations board over the whole thing