No. Nobody here wants it.
Not perhaps among the demographic who would regularly post to international political forums. I wouldn't necessarily project from there onto the population at large.
As politicus says, the motivation, if it comes, will come from Northern Ireland. That requires a majority wanting reunion, and while that may come closer with demographic change, there are two dampeners from the point of northern nationalists:
i) the state of the economy/society in the south (not currently looking good),
ii) worry about how the "law-abiding" current majority would react to being outvoted in a democratic election.
(I wouldn't pay much heed to the likes of the Northern Ireland Life and Times surveys; given their massively skewed results when it comes to political party support, it's clear that they measure the opinions that people feel comfortable expressing to total strangers in a society where "whatever you say, say nothing" is still a wise course of action.)
If there was a majority in favour of reunion in the north, I wouldn't expect there to be any significant opposition in the south (the occasional bobo excepted). But I don't expect it to happen any time soon.