I'm trying to keep up with the amicus briefs for Heller — here's the link from Volokh. Of course the one you've heard about the Congressional amicus brief FOR Heller, signed by Vice President Cheney. Here's the NRA take:
Led by Sen. Kay Bailey Hutchison (R-Texas), bi-partisan majorities of the U.S. Senate and House of Representatives - in fact, the largest number of co-signers of a congressional amicus brief in American history - filed a strong brief in support of the individual rights view. 55 members of the Senate and 250 members of the House co-signed this brief along with the Vice President of the United States. This landmark brief argues that the Second Amendment guarantees an individual, fundamental right to Keep and Bear Arms; that any infringement on this right should be subject to the highest level of constitutional scrutiny; that D.C.'s categorical ban on handguns and self-defense in the home is unreasonable and unconstitutional under any level of review; and therefore, that the Court of Appeals for the D.C. Circuit's opinion in this case should be upheld.At least not every Republican has sold us out!