The Parallel Composer beta forum doesn't appear to be up yet. (http://software.intel.com/en-us/forums/intel-parallel-composer-beta/)
I have aVisual Studio solutionwith ~120 projects. In Visual Studio 2008 I can right click the main solution and find a menu item - Intel Parallel Composer 2011, where I can choose to use Intel C++ or use Visual C++ for the entire solution. In Visual Studio 2010 there is no such menu item, so the only way I have found to switch from Visual C++ to Intel C++, or vise versa, is to right click each individual project. This is very tedious for 124 projects. I have elected to stick with Visual Studio 2008 for now.