This interview with the lead attorney on Heller is definitely worth reading:
One key unresolved question in D.C. v. Heller is whether it limits the states as well as the federal government. The Bill of Rights originally restrained only Congress, but under the "incorporation" doctrine, the Supreme Court has held that the 14th Amendment protects most constitutional rights against state encroachment. Because the capital is a federal district, its local government is a creation of the U.S. Congress. Heller gave no reason to think incorporation doesn't apply, but further litigation will be necessary to settle the question.
Nor does Heller settle which restrictions are constitutional and which are not. Justice Scalia wrote that "nothing in our opinion should be taken to cast doubt" on laws against possession of firearms by felons or the mentally ill or in "sensitive places" like schools or government buildings, or laws regulating commerce in firearms. That's fine with Mr. Gura, but many laws currently on the books fall somewhere between these uncontroversial provisions and D.C.'s onerous restrictions.
These questions will be sorted out in litigation to come. Mr. Gura's first stop: Chicago, which has a handgun ban identical to Washington's and burdensome registration requirements for long guns.
The Chicago lawsuit was "ready to go" when the Supreme Court decided Heller on June 26. "I looked at the opinion," Mr. Gura says, "and I called my counsel in Chicago and said, 'Yeah, looks good.'" The next day another lawsuit was filed, challenging the ban on handguns in San Francisco's public housing projects. Among the plaintiffs: the National Rifle Association. Thanks to Mr. Gura's efforts, the NRA is no longer gun-shy about going to court.