Getting here
Ryanair http://www.ryanair.com/ fly to Dublin from all of the following airports. Prices from as little as 1p/1c.
Aberdeen
Birmingham
Bournemouth
Glasgow (Prestwick)
Doncaster Sheffield
Durham Tees Valley
Humberside
Eindhoven
Valencia
Frankfurt (Hahn)
Hamburg Lübeck
Milan (Bergamo)
Edinburgh
Berlin (Schonefeld)
Marseille Provence
Blackpool
Malmo
Liverpool
Paris (Beauvais)
Manchester
Bristol
La Rochelle
Leeds Bradford
Nantes(Brittany)
Newcastle
London (Gatwick)
Porto
East Midlands
Brussels (Charleroi)
London (Luton)
London (Stansted)
Bratislava
Baden Stuttgart
Biarritz
Gothenburg
Krakow
Poznan
Riga
Lodz
Kaunas
Reus (Salou)
Pisa (Florence)
Girona (Barcelona)
Faro
Venice (Treviso)
Wroclaw
Salzburg
Carcassonne
Murcia (Alicante)
Malaga
Rome (Ciampino)
Aer Lingus http://www.aerlingus.com fly from:
Bristol
Glasgow
London
Brussels
Berlin
Amsterdam
Vienna
Valencia
Rennes
Milan/Linate
Marseille
Toulouse
Munich
Bilbao
Bologna
Zurich
Krakow
Warsaw
Faro Algarve
Nice
Lyon
Rome/DaVinci
Almeria
Dubai
NYC
Boston
Chicago/OHare
Los Angeles
Most national European airlines (BA, KLM, Air France etc.) also fly direct to Dublin, and there are so many flights from all London airports that if you can get as far as London, you should have no problem getting to Dublin.
Stena Line http://www.stenaline.com/ operate ferries (car and foot passengers) from Holyhead to Dublin Port and to Dun Laoghaire (just outside Dublin), from Fishguard to Rosslare (2 hours from Dublin) and from Stranraer to Belfast (2 hours from Dublin). There are also ferry services from France but unless you want to spend 20 hours on a ship, don't bother!
So, no excuses. As soon as we've agreed on a date I expect everyone to find the cheapest way of getting here and book it!