Can anybody clarify if Microsoft has released a [draft] specification of C# 4.0 yet? If so, where can I find/download it?
Try here C# 4.0 Documentation it may be too high level for you.
Not yet, though many of the features have been announced. The DLR (dynamic language runtime) extensions, which are the biggest new feature of 4.0 are available in pre-release beta form. My company www.thinkbottomup.com.au has used them extensively in case you're in need of any help :)
oh... see here for further details
No spec yet, but the CTP is available for playing with - but note that this doesn't yet include all the features discussed in the the (preliminary) documentation - in particular, many of the dynamic
features (in particular operator support) are missing (meaning: the C# language / compiler features that work with dynamic
; for all I know the runtime supports them but the language doesn't yet).
It will also be interesting to see how many of the new Expression
methods are supported by the language when compiling a lambda.