For lucky French fans, Un jour mon père viendra will be released on DVD (Region 2 format) tomorrow in France. Here's a link for Amazon.fr..
For Canadian fans, as well as those in the United States who don't mind paying a wee bit more for an import (and I do mean wee since the U.S. and Canadian dollar are nearly equal at the moment), the film will be released on June 12 (Region 1 format). Here are a few links for pre-ordering: Amazon.ca, cdplus.com and hmv.ca. Prices range from $21-$22, excluding shipping.
The date for a discussion post is yet to be determined. Likely it will be towards the end of the June to give people time to purchase the film and watch.
Bonus: still more photos from Phoenix Comicon! I think we can all agree Phoenix fans are AWESOME. The photos, both from Jamie's Q&A as well as photo ops, can be found HERE on Flickr.