Rockstar Games announced today (link below) that Red Dead Revolver is now available for purchase as a downloadable "PS2 Classic" from the PlayStation Store, along with two other PS2-era Rockstar games (Bully and Midnight Club 3). Each title is $9.99 in the U.S. store. For those outside the U.S., check your local PlayStation Store for pricing.
As a "PS2 Classic", the title will be exactly as it was on the PS2, meaning no graphical improvements, trophy support, etc. This is still a great opportunity for PS3 owners to check out the predecessor to Red Dead Redemption (and to contribute to the wiki along the way, right?).