0: Install Netatalk Package
1: Find iPhone in Finder
2: Click "Connect As"
3: Login as "root" or "mobile"
The default password from Apple is "alpine" for both of these accounts.
4: Click "Connect"
5: Consider Donating ;P
It took me a while to get Netatalk working on the iPhone, as well as constructing this How-To. Donations from users like yourself provide me the time to do this type of work.