I will be travelling to Ireland in April and would like to know which are the hotels that are on the stops that are serviced by the shuttles.

When you book your hotel they wll tell you if it is a shuttle stop. go to the website . it is about 8 euro one/way & they operate 24/ 7.

Have a dig through the information here: http://www.dublin-airport-hotels.ie/

Or here:
http://www.dublinairport.com/at-airp.../bus-area.html
The hotel buses listed at the bottom of "Zone 2" are the courtesy shuttles for hotels in the proximity of the airport.

As you can see in Padraig's list, there are many more in the airport area. Those without free courtesy buses can be less expensive; even when calculated with two taxi rides on top of the price of the accomodation.

Sorry I did not make it clear. I really want to stay in town hotels that are serviced by the shuttle to save time and cost!