Not sure if it really qualifies as infrastructure but theres a good article and pictures of the emerging Lansdowne Road Stadium in todays Irish Times.
http://www.irishtimes.com/newspaper/sport/2008/0915/1221257218317.html
Looks like the development is proceeding at a pace. Should be a great atmosphere in the compact stadium for the big games. Always think Croke Park is just too big and needs a full house to generate any atmosphere. (and it looks like its only 3/4 finished with the uncovered Hill 16 end.)