IDE's with GitHub code comment integration

Is there an IDE (or plugin for Eclipse, for example) that integrates the GitHub API such that you can see and add pull request comments within the IDE? I occurred to me while switching between Aptana and GitHub's pull request inline comment view, that it was a bit dumb to search for line numbers to find the comments when GitHub's Pull Request Discussion API[1] provides the data you'd need to integrate it into your IDE. Already done? Or something I should look at building?