So I actually managed to get this working.  The instructions here helped a bunch: http://redwallaus.com/2013/04/04/airprint-with-raspberry-pi/

Printing is very slow, but it works without a hitch!

**EDIT**

Per piers7's comments, I have pasted the content of the article into this post.  

## Prerequisites

For this guide I will assume that you have already setup your Pi with Raspbian.

* Putty
* Filezilla
* MP620 Canon Printer (Thats what I'm using)

## Download

 * download [bjnp](https://web.archive.org/web/20160322200132/https://sourceforge.net/projects/cups-bjnp/?source=dlp) files

# Install

    sudo apt-get update
    sudo apt-get upgrade -y
    sudo apt-get install avahi-daemon avahi-discover libnss-mdns cups cups-pdf gutenprint pycups avahi python2
    sudo apt-get install cups
    sudo apt-get install python-cups
    sudo apt-get install avahi-daemon
    sudo usermod -aG lpadmin pi
    sudo /etc/init.d/cups start
    sudo /etc/init.d/avahi-daemon start
    sudo nano /etc/cups/cupsd.conf

Now edit the config file by commenting out the below line with a # and add Port 631 to the line below

    #Listen localhost:631
    Port 631

Under # Restrict access.. add Allow @Local as below

    # Restrict access to the server...
    Order allow,deny
    Allow @Local
 
And add `Allow @Local` again under the following headings

    # Restrict access to the server...
    # Restrict access to the admin pages... 
    # Restrict access to configuration files...

Restart cups: `sudo /etc/init.d/cups restart`

Copy the downloaded bjnp files to the Pi using filezilla

    sudo apt-get install libcups2 libcups2-dev
    tar zxf cups-bjnp-1.2.1.tar.gz
    cd cups-bjnp-1.2.1/
    ./configure –prefix=/usr
    make
    sudo make install
    sudo mkdir /opt/airprint
    cd /opt/airprint
    sudo wget -O airprint-generate.py –no-check-certificate https://raw.github.com/tjfontaine/airprint-generate/master/airprint-generate.py
    sudo chmod 755 airprint-generate.py
    sudo ./airprint-generate.py -d /etc/avahi/services
    sudo reboot

Type https://XXX.XXX.X.X:631/admin into your browser and enter.

Select add printer

Follow the prompts to add your printer for example a mp620’s ip might be bjnp://XXX.XXX.X.XX:8611