It is true... just not on our side of the planet. Season 3 is out on Region 2 DVD, on six discs, released September 3, 2007 (but apparently with no extras at all... no podcast commentaries, no deleted scenes, none of the resistance webisodes, nothing).
For North America, where most of us watching Space live (or more particularly, Canada), the release is speculated to be "spring '08" as mentioned earlier... although that doesn't necessarily mean that the poster isn't a Cylon or collaborator, just that their report is accurate for this part of that small dirty orb called Earth.