Yes, I'm sure your current location is fine. Presumably it will appear as a ghc/nhc98 "package", just like HOpenGL, HaXml, etc.
That's the plan - I'm copying package descriptions over from HOpenGL in the hope that they will work after suitable tweaking.
2) Is this the right place to put the X11 module in the hierarchial namespace?
I don't know exactly what your X11 library provides, but assuming that it has a mix of rendering and user interface capabilities, I would guess that Graphics.X11 might be an OK location?
X11 provides most of what /usr/X11R6/lib/libX11.a contains. That is, operations for input (mouse/kbd events and the like) and operations for output (create windows, draw lines, fonts, etc.) It doesn't provide any higher-level stuff like scrollbars, menus, etc.
As for your Win32 library, again I don't know exactly what capabilities it provides. If it is mainly a mixture of graphical things, then Graphics.Win32 would be right, but if it is wider in scope, such as perhaps interfacing to the entire win32 DLL, then System.Win32 would seem more appropriate.
It provides graphics (as in X11), input (as in X11), dialogue boxes (unlike X11), file I/O (as in Posix), Win32 registry stuff, and a bunch of other stuff. It seems like System.Win32 is the right place to put this in analogy to System.Posix. A