Will Cilk++ understnad code written using new c++0x features?
(I'm using g++ 4.3 and 4.5 and our code uses variadic templates, decltype keyword, lambdas and more)
I believe that the Linux version of Cilk++ is based on g++ 4.2.4. I'm afraid I don't know how the features you listed map to that version.
Support for Cilk is being integrated into Intel's C/C++ compiler for
both Linux and Windows. You can request to join the beta at http://software.intel.com/en-us/articles/intel-parallel-studio-microsoft-visual-studio-2010-support/
The beta version of Intel's icc compiler, which should include Cilk technology (pending the results of beta testing), will support decltype, lambdas, rvalue references, and other C++0x features, but not yet variadic templates.