Update: 1Password on Snow Leopard – Switchers’ Blog http://www.switchersblog.com/2009/08/update-1password-on-snow-leopard.html
64-bit Snow Leopard defaults to 32-bit kernel | Apple – CNET News http://news.cnet.com/8301-13579_3-10320314-37.html
Snow Leopard Compatibility: Mac OS X 10.6 Snow Leopard Compatibility List http://snowleopard.wikidot.com/