Pinnaclesports.com is one of the largest online sportsbooks in the world, and they're following a trend in the offshore sports betting industry, namely opening their own online poker room for their clients. They've selected the Prima Poker Network, and in early 2006 they will become the latest skin for that rapidly growing poker network.
Pinnacle Sports faced a typical problem for new entrants into the incredibly competitive online poker market, and like most would-be poker room operators they came to the sensible decision to team up with an exisiting network rather than start from scratch. In that regard they differ to their big competitor in the sportsbook market - Bodog, which recently launched Bodog Poker, powered by propietary software. Pinnacle's poker site will instead be powered by Microgaming software.
Microgaming is the most popular choice for online casino software, and through their Prima Poker Network they are trying to do the same with their online poker software.