I have been thinking about how the language will handle object files. Since the language will allow significant parts of the language to be figured out at the point at which it is used. I think that the source files may be required to be included with library files.
It also may be possible that whole projects get compiled all at once. I know that it won't take extreme excess of time to compile whole projects, as it doesn't take D very long to compile whole projects at once.
One thing I would like to be able to do is have programs that will work, on say Linux and Win32, without recompiling. Or barring that, at least be able to have it use advanced features of the current processor, but still be able to run correctly on less sophisticated processors.