It looks like Vodafone Ireland will be adding the HTC Titan to its WP7 offerings, which currently only consists of the LG Optimus7 (E-900).  They have added a "Coming Soon" page for the 4.7" monster where you can register to be notified when it is available.  The Titan is available for pre-order on Clove, who says that initial stock arrives in "early October" and we know it will be hitting the Netherlands on October 7th, so it hopefully will arrive in Ireland around the same time.

Source: Vodafone Ireland (Thanks for the tip, Mike!)