Which constitutional rights are disposable?

In a recent article in The Atlantic Monthly's online edition, Conor Friedersdorf questions why conservatives focus almost exclusively on the 2nd Amendment right to bear arms while willingly, even eagerly, accepting federal encroachment on other constitutional rights.

The article has certain problems--the author's definition of issues best left to states is standard liberal fare, moreover his assumption that liberal institutions and media stood alone in opposing executive branch inroads on constitutional rights is wrong--see Ron Paul for proof.

Still, the article makes a number of points really well. In particular, the warning about a standing army backed by the words of founding fathers is one every lover of freedom should consider.