Yes, it is still there. It actually is in the same place as it was in Windows 7 – you just could find it more easily because it was in the GUI. As this is not the case anymore you just need to do a Start->Run and then replace your username as shown:
I like, for instance, to have ZoomIt in there (Sysinternals tool) and some shortcuts. And yes, you can put an exe in that folder.