<A target="_blank" href="http://www.lntoolbox.com/content/view/95/2/">Lotus Notes / Domino 8.5 is available for Download</A> from the IBM Passport Advantage Website. New in Lotus Notes/Domino 8.5:
xPages
ID Vault
Domino attachment and object service (DAOS)
Remember - there is a regression bug in 8.5 AdminP for which you need to download the Interim Fix for 8.5. Bastian Wieczorek provides links and more information from his site.