Just in case you managed to somehow not be expecting this, as of just now Snow Leopard developer documentation, sample code, and Xcode 3.2 download are live at
http://developer.apple.com/mac/
and there seems to be quite a revamp of the reference library to go with it:
http://developer.apple.com/mac/library/navigation/
There was notice on the lists that Snow Leopard NDAs are now lifted, so … well, actually we don’t have anything Snow Leopard specific we were keeping secret, far as we know all our projects were compatible with only trivial tweaking here and there. Compatible enough that we’re not going to jump on the upgrade bandwagon immediately, we’ll give it a couple weeks and see if any massively widespread freakouts become apparent in developer land either iPhone or desktop. But if you’re ready for the bleeding edge, there you go!
[UPDATE: Heh, that was quick -- already an issue that would have been a problem for various domains of trolldom showed up on cocoa-dev:
Here's the problem. Snow Leopard ships with OpenSSL 0.9.8, with a universal 0.9.7 and PPC32-only 0.9.6 thrown in for backward compatibility reasons. The 10.6 SDK comes with the headers for 0.9.8, but not 0.9.7.
So if you need to use libcrypto 0.9.7, you must use the Leopard or Tiger SDKs. You can't use the Snow Leopard SDK and libcrypto unless you want to make your software require Snow Leopard. (You could try moving and linking things around, but then who knows what you'll break...) If this is going to be a problem, then you might want to consider using an alternative cryptography engine.
Righty then. Apparently it will be a little while before we move our operations wholesale over to Snow Leopard!]
AUG