Although there are sites showing a March 31 release date for Rescue Dawn there are an equal number showing it as not yet known. Variety reported a number of international distribution agreements were reached for the film at the European Film Market you can check out the countries and distributors here

The worst preview site - that actually do really good previews - ah the irony - have a preview for Rescue Dawn up and finally I found a blog entry by an extra on Rescue Dawn on google. Herzog sounds like a great man!