I did not participate in the 2007 event so if you wouldn't mind, how is it performed in countries which are not Ireland (Canada in my case). Is along the lines of a synchronized fire lighting?

Yes. :-)

http://nicdhana.blogspot.com/2007/10/more-pledges-for-tara.html

http://paganachd.com/tara/

http://andrewnusca.com/2008/03/12/reconstructing-ireland-at-home/

Many thanks