As I am sure you have seen from the Events page the Global Game Jam is happening on 23rd-25th of January. The Dublin site is being run by Griffith College Dublin and being hosted by Microsoft Ireland. Anyone looking to register for tickets should go to http://www.bit.ly/ggj15dub.
For other Irish locations can be found here : http://globalgamejam.org/2015/jam-sites?title=&country=IE&locality=
I hope to see you at the event.