Sigma has been using Foveon sensors in its cameras for a couple years now, although some questioned the efficacy of said sensor in their ambitious but disappointing DP1. (Good explanation of the Foveon sensor here). Apparently, though, Sigma is confident enough in the technology that they’re willing to buy Foveon lock, stock, and barrel. Maybe they know something we don’t.
What does this mean for you? Well, it means that they’re going to keep on plugging away with their current strategy, and hopefully the DP2 will be a real player. I was rooting for them; it must be difficult to be a third party in the DSLR business. Nobody knows when the DP2 is due, but I’m looking forward to it.