The Canon EOS 20Da, a version of the 20D tuned for astrophotography, will ship in July 2005 at an estimated street price of US$2199 in the USA.
It will ship the same month in Canada (and probably other world regions also), at a list price (MSRP) of CDN$3500. (MSRP is almost always higher than the actual selling price.)
For more information, see the press releases from Canon USA and Canon Canada. An earlier article on this site describes the differences between the 20D and 20Da.
• Added information from Canon Canada (June 3, 2005)