Currently Being ModeratedOct 18, 2011 2:07 PM (in response to CraigT)
Snow Leopard is unsupported for iCloud. Some users might give you manual server settings that you can put into Snow, but Apple does not support that.
The one and only official Requirement : You need to upgrade to Lion 10.7.2 on ALL Macs and run iOS5 on devices that should be synced across icloud. Snow is no longer useable for the new services of Apple.