From 12 March 2012, CityLink's Galway-Dublin services will set-down at a bus stop on North Wall Quays, outside the Clarion Hotel, close to Samuel Beckett Bridge. This stop will be particularly handy for people going to the O2, Bord Gais Energy Theatre and IFSC, and is in addition to the current drop-off point on Bachelor's Walk near O'Connell St.
Their Dublin to Galway services (both commuter and express) continue to pick up passengers at Aston Quay, outside Eden Recruitment, near Ha'penny Bridge.
See their website for full details, or Dublin city bus stop for a map of all major Dublin city bus stops that are used by Galway bus services.