How will people in D.C.....

[Bart]

Heller carries a gun on duty to protect others. Maybe he can keep it at home to protect himself in a few months.

[HerbM]

Since D.C. isn't really a state, can the residents of D.C. purchase from a dealer in Virginia?

For now that is the law -- until the situation changes or someone challenges it (successfully.)

How is it that only one FFL is operating in DC, and that it's a Brady supporter? How can an area be limited to ONE FFL?

It's not clear that this one is still active but your point is well taken. HCI, the BATFE themselves, 2 theater companies, and two without a web presence although I have been thinking about calling them to find out.

If D.C. residents are limited to only purchasing guns in D.C., and the district's only FFL refuses to sell them a handgun, what steps would they have to take to file charges against this FFL and/or the District of Columbia for denying their RKBA? What is the probability that they would win?

Pretty good I think, but that has to be challenged -- it will happen if things don't change.

I really feel for these people; Heller may have helped their case, but didn't completely solve the problem.

No, it didn't. Heller (or Parker and the others) was never chosen to solve all the problem but to estalish as simply as possible that the 2nd Amendment protects an individual right of each American, and cannot be ignored nor treated as obsolete.

It succeeded brilliantly in doing that, perhaps at the one moment in history when it could do that (if Obama is elected). Levy (the lawyer who independently financed) the Heller case chose the time to match when he expected Bush to get new appointments to the Court -- had a democrat been elected (or if one is elected) then like 1-4 Supreme Court Justices will be replaced before the Republicans have another chance.