With the rendering of the Obergefell v. Hodges case on June 26, 2015, my old article outlining differences between LGBT planning and hetero planning is no longer necessary. If you would like to read about the Obergefell case, the Wikipedia article is quite good as well as my own article on the Obergefell case.
Same-sex estate planning is now exactly the same as for hetero spouses. While there are still some issues remaining to be resolved by the courts or legislatures, the fundamental estate-planning purposes of planning for incapacity and death are now equal.
Over the next several years, we will see the courts and legislatures resolve issues about whether or not LGBT status is a protected class, cases on parental rights of LGBT spouses that adopt, and other new cases we haven't thought of yet.