Wow some of the reactions are way out of proportion (here, in the Irish and UK press, and that douche Keane).. the fact that they're French is irrelevant, maybe some should come up with derogatory terms about the Swedes seeing how the ref was from there.. Good luck with that.
Anyway, a replay seems fair to me. France should request one as well. After all if you can't beat Ireland fair and square you shouldn't be going to the WC, not much you'll be able to do there against the better teams.