From what I know the old coach program is not available for quite some time when new Nike+ Running site was launched a few years ago back in 2012.
Now you select coach in the drop down list on your Nike+ Running app.
"Get training programs, run reminders and the push you need to go farther and faster than ever before. With Nike+ Coach, you will get everything you need to be race-day ready.
Choose between 5k, 10k, Half-marathon or a full Marathon training!
Choose between beginner, intermediate and advance.
I chose 5K beginner to start getting back to running again.
You can also key in your race name and date so Nike+ can remind you when to run. Nike+ Running Coach will provide you with daily workout instructions, weekly progress updates with detailed stats, and alerts about upcoming workouts.
Looking back at the Nike Coach back in 2010