It was announced last week here in Ireland by Xpose an Irish TV show, that Jovi would play 2 nights at the new Lansdowne Road Stadium (now called Avivia Stadium) in 2011. It was also on radio and on newspaper (daily mirror, not really beleiving them)

Not sure totally weather to beleive this or not.
But its out there.

Them playing in Lansdowne I totally beleive as this is where they will play.
But 2 nights? I don't think they have ever played two nights in Ireland!