Based on this YouTube tutorial by Mark Tucker: http://www.youtube.com/watch?v=B1E0YXXITWg
Download mean.io, unzip, cd to directory. Be sure to get all hidden files.
npm install
Set up Heroku account
Then https://devcenter.heroku.com/articles/quickstart
Install Heroku Toolbelt
bower install
Edit .gitignore to remove public/lib
git init
git add .
git commit -m "init commit"
heroku login
heroku create
heroku keys:add
git push heroku master
https://dashboard.heroku.com/apps
Click on app
Click on Run Production Check
Add free tier Papertrail addon
Add free tier MongoHQ
Go back to Apps, click on app, then MongoHQ
Click Admin collection, then Users
Add a user w usr/pwd
Click Overview and copy Mongo URI
Depending on mean.io at the time of install, the file to update is config/env/development.js. Change the db: property to new URI w correct usr/pwd.
git add .
git commit -m "add db"
git push heroku master
heroku open
Marvel.