It’s been a long wait for Leopard users, but 10.5.2 is now available from software update or from the Downloads section of the Apple website.
The full list of fixes contained within the update is available here.
At 180MB the update isn’t as large as originally predicted.
Update: After downloading the 10.5.2 update, there’s another update available via Software Update – Leopard Graphics Update. The update is also available from Apple Downloads here.