Amazon.ca is allowing pre-orders for The River King, to be released on DVD on January 24th, 2006. It's $20.70 CDN and in Region 1 encoding. Thanks to Sands (and Richard) for the heads-up.
Americans can pre-order it from Movies Unlimited which is selling it for $22.49 USD. Barnes and Noble has it for $19.98 (non-members) or $17.98 (members).
According to distributor First Look Pictures, the DVD features scene selections, previews, plus Spanish and English subtitles. Here's the cover from that site.