North Carolina is the last southern state to not have an anti-gay marriage constitutional amendment, but if the right-wing has any say in the matter, that will change very soon.
You can help Equality North Carolina by contacting the state's legislature and filling out ENC's form and telling them that you do NOT support such an amendment.
Another action you can perform is to attend ENC rally at the state's capitol on Tuesday, March 24th to lobby for equality. If you know anyone who lives in the state, tell them about it! Details can be found here.