This afternoon Apple released a security update and a Flashback removal utility for Leopard (Intel only). Like the previous version for Snow Leopard/Lion, this updater removes older versions of Adobe Flash Player.
As expected, PPC Macs are ignored. MacinTouch's Security Reader Report includes an interesting item about this and Apple's policy of dropping support for OS X versions more than 2 iterations old. The latter may leave about half of all Macs unsupported (with regard to security updates) when Mountain Lion is released.
