Little Valin Shinyei has been cast as Boyle Longstreet, Caolan and Susan's son in the show. (It would appear that, based on Kristin Kreuk's casting, they did cast Boyle younger than originally written in the script.) On Valin's IMDb listing, there's a great photo of the Longstreets gathered together. (Jamie, Katelyn Mager, Valin and Kristin):
Photo © Jocelyn Peden
In other news, Ron Moore and Michael Rymer have apparently absconded to the editing bay in Los Angeles to begin assembling the pilot's first cut. Keep every available appendage crossed, people..