Create a github account at http://github.com. Once you've got your account set up let me know what your handle is so I can give you access to the topratedpump file repository.
Follow the steps for Mac OS X on this page: http://github.com/guides/providing-your-ssh-key Once you get your SSH key set up you'll need to visit your github account page and paste in your key there: https://github.com/account
Download and install MacPorts from http://www.macports.org/
Open up Terminal.app (Use spotlight or quicksilver to find it) and type the following things..
port install git-core (this will take a while and might prompt you a few times) git config --global user.name "Bobby Goldie" git config --global user.email bob@bob.com
cd ~/Desktop/RGC/ (this moves you to your project folder) git clone git@github.com:zeke/topratedpump.git
More to come!