AeroXP and World of Apple have posted screenshots from the latest built of Mac OS X 10.5 (Leopard).
These screenshots depict some additional features from Leopard including:
Leapard's Firewall preference tab
The Firewall alerts you when an external machine tries to enter your machine
File Recovery is now included, allowing you search and restore deleted files
Apple seeded the latest version of Leopard (9A303) to developers last week.