Valve and Tilted Mill Entertainment announce that Children of the Nile: Enhanced Edition is available via Steam, offering a version of this historical city building game that's updated with Vista support and a number of enhancements to the UI (all detailed here). Those who already own the original Children of the Nile are entitled to a free update that's "coming soon" to the game's official website (presumably this really will be soon, as they've announced it is supposed to be available already). Finally, Steam is also offering a Children of the Nile Enhanced Edition Demo for those interested in a sample.