As usual, the review of Mac OS X 10.6 by Ars Technica is awesome and full of gold nuggets.
It gives a nice description of the changes under hood. I was particularly interested by:
- the explanation of LLVM and Clang (and the code analyzer provided by Xcode 3.2)
- the addition of Closures to C and C-derived languages
- the design and implementation of Grand Central Dispatch.
Now, I just need to find another pet project to play with all these new features.