I mapped the 2010 route with the change on stage four on MapMyRide if anyone's interested:
http://www.mapmyride.com/route/ie/co.%20mayo/965127068504897146
Its handy because it can show the topography etc, but it can also show a graph of the ascents and descents. So, if like me you're a first timer this year, it'll give you an idea of the hills.
It's not 100% accurate due to the odd missing road on Google Maps, but I think it's fairly close.
Just getting properly stuck into training now...can't wait!