Yes as far as I can tell this is the only one of their games that gets any updates. Not Conquest of Ellysium II (available for free download), or Dom1, or Dom2, or even the Dom3 demo. Maybe they still play occasionally and are keeping it up with their new toys (netbooks and such)
edit: by "here" I mean that Shrapnel nicely hosts it and makes it available for free download
http://www.shrapnelgames.com/Our_Games/Free_Games.html