MacScoop and Think Secret report Leopard should be going final candidate after developers report back to Apple about the recent build 9A527. Perhaps one other build to address any concerns.
Further evidence is from AppleInsider who reports on the narrowing focus of Leopard development—Parental Controls, Time Machine, DVD Installations, Network Connectivity, Printing, FileVault, Mail, iChat, iCal, .Mac Synching, and Spotlight. These sources are evidence of a flurry of activity as Apple begins final preparations for Leopard’s release in October.
YouTube has presumed unauthorized video of the welcome movie and Time Machine , considered the most exciting new feature in Leopard.