It turns out the GameTap availability of Jericho mentioned below is because the game is now available in North America, and the gold story below that references the European edition of the game, as Voodoo Extreme has news the game is now available in North America. Here's the story about the playable demo, while the press release on VE is interesting in where it does and doesn't differ from that European announcement:

Just in time for the scariest holiday of the year, Codemasters today announced its long-awaited action/horror game Clive Barker's Jericho has shipped to retail outlets nationwide. A terrifying squad-based shooter based on an original concept by the master mythmaker, Clive Barker's Jericho is available for the Xbox 360 video game and entertainment system from Microsoft, the PLAYSTATION 3 computer entertainment system from Sony and Games for Windows, and is rated "M" (Mature - Blood and Gore, Intense Violence, Sexual Themes, Strong Language - Content that may be suitable for persons ages 17 and older) by the ESRB. Cited as, "A poop your pants scary video game," in the October 2007 issue of Stuff Magazine, Clive Barker's Jericho is a spectacular, creative, blast from Barker's cannon of nightmares, and an interactive experience that mingles the darkest elements of his horror fiction with an ambitious, age-spanning story aimed at mature gamers, fans of Clive Barker and horror fiction enthusiasts.

Clive Barker's Jericho dispatches gamers to the Middle-Eastern city of Al-Khali, where the most ancient of evils has resurfaced; causing intense paranormal activity that has caught the eye of the military. Controlling the Jericho squad, an expert strike team skilled in both conventional and paranormal warfare, players fight their way through slices of time on a grueling journey as they make their way toward the heart of the evil. Along the way, gamers encounter the horrific armies of hellish denizens that now rule the city and corrupt everything they touch, and as they incrementally approach the source of evil, players will have to rely less and less on traditional weapons and instead focus on the combined psychic talents of the Jericho Squad.

Additionally gamers can still download the Clive Barker's Jericho playable demo for the Xbox 360 from Xbox LIVE Marketplace and the PLAYSTATION 3 system version from the PLAYSTATION Network, with the Games for Windows demo available from the official game website.