To me, the fight for marriage equality is extremely important to the transgender community. The right of a transgendered person to marry the person they love shouldn't depend on surgical status or change of gender on birth certificate. Another essential issue is insurance. If health insurance companies were required to pay for gender reassignment surgery, it would immeasurably benefit the transgendered community.
Finally, I believe the most important issue is public awareness. If more people were aware of the existence of transsexuals (beyond the obvious stereotypes perpetuated by the media), more people would accept us, and fewer people would fear our existence. The gay and lesbian community has done a good job of making people aware of their existence--with parades, marches, and coming out days--but the transgendered community isn't as visible and thus isn't as accepted. Not being shunned isn't a privilege--it's a right.