Push to Multiple Git Repos @ http://maxburstein.com/blog/push-to-multiple-git-repos

.git:config

[core]
        repositoryformatversion = 0
        filemode = true
        bare = false
        logallrefupdates = true
[remote "heroku"]
        url = git@heroku.com:maxburstein.git
        fetch = +refs/heads/*:refs/remotes/heroku/*
[remote "github"]
        url = git@github.com:mburst/burstolio.git
        fetch = +refs/heads/*:refs/remotes/github/*
[remote "origin"]
        url = git@heroku.com:maxburstein.git
        url = git@github.com:mburst/burstolio.git