I just saw this come up. It seems that the US District Court in DC has ruled that the District's ban on concealed carry is unconstitutional. The Heller, McDonald, and Peruta decisions were all cited in the decision.
"In light of Heller, McDonald, and their progeny, there is no longer any basis on which
this Court can conclude that the District of Columbia's total ban on the public carrying of ready-to-
use handguns outside the home is constitutional under any level of scrutiny. Therefore, the
Court finds that the District of Columbia's complete ban on the carrying of handguns in public is
"Judge Frederick Scullin Jr. wrote in his ruling in Palmer v. District of Columbia that the right to bear arms extends outside the home, therefore gun-control laws in the nation’s capital are “unconstitutional.”
"Judge Sculin extensively referenced the Supreme Court decisions in District of Columbia v. Heller (2008) and McDonald v. Chicago (2010) to concluding “there is no longer any basis on which this court can conclude that the District of Columbia's total ban on the public carrying of ready-to-use handguns outside the home is constitutional under any level of scrutiny.”
Of course, it will be appealed, and might end up like Illinois did. Perhaps they'll even appeal it to the US Supreme Court, something that Illinois decided not to do. We shall see.