The X packages could use some manual dependencies added in distro-import that
IPS isn't currently automatically adding.

SUNWxorg-headers should depend on SUNWxwinc, since many of the headers in
SUNWxorg-headers #include SUNWxwinc headers.

SUNWxwinc & SUNWxorg-headers should depend on SUNWhea, since many of the
headers #include standard system headers.

NVDAgraphics & SUNWxorg-mesa should depend on SUNWxwplr, since the links to 
the OpenGL libraries in them won't be set properly without the ogl-select 
service delivered in SUNWxwplr  (though SUNWxwplr should probably be folded 
into SUNWxwplt at some point).

SUNWxorg-server & SUNWxvnc should depend on SUNWxorg-xkb, since the keyboard 
will be unusable in the X servers if it can't load the XKB data files from 
that package.

SUNWxorg-server should depend on SUNWxsvc, since the X server can't abuse
the PCI bus address space to manipulate graphics devices without the xsvc 
driver (on x86 only - on SPARC, we use fb drivers instead).