> I've been looking (on and off) for the past several months for a way to
> accomplish this topic's namesake. There are many gems for Ruby 1.8x and
> a few that even support earlier previews of 1.9.1, but I haven't found
> any that support the current version (1.9.2) or even the official 1.9.1
> release.

Currently there's no way to get the nodes of methods with 1.9.{1,2}
It might be added in 1.9.3
You can get to the code by using Method#source_location at times, then re-parse.
GL!
-r