I won't be attending the Meego Conference but i've been living in Dublin for 11 months so there is one advice i can give you.
Make sure you come with the correct clothes.
The weather forecast for the coming days is:
* Temperatures between 0 and 10ºC
* Heavy wind
So bring a good coat (if possible water proof-ish and with hood), a scarf or similar and a hat/cap/something for your head.
I hope the Aviva Stadium was really cheap otherwise i don't understand why someone would like to have a conference here at this time of the year :D
Update: Remember that Ireland uses a different power socket than mainland Europe