lets try again...

sources_non_forked/vim-addon-mw-utils/autoload/buf_utils.vim

@@ -0,0 +1,24 @@
+" buf_identifier is either a buf_nr or a filename
+" If any window shows the buffer move to the buffer
+" If not show it in current window (by c-w s c^ you can always
+" reshow the last buffer
+"
+" Example: buf_utils#GotoBuf("/tmp/tfile.txt", {'create': 1})
+" returns: The command which was used to switch to the buffer
+fun! buf_utils#GotoBuf(buf_identifier, opts)
+  let buf_nr = bufnr(a:buf_identifier)
+  if buf_nr == -1 && ( get(a:opts, 'create', 0) || has_key(a:opts, 'create_cmd'))
+    exec get(a:opts,'create_cmd','e').' '.fnameescape(a:buf_identifier)
+    return "e"
+  else
+    let win_nr = bufwinnr(buf_nr)
+    if win_nr == -1
+      exec 'b '.buf_nr
+      return "b"
+    else
+      exec win_nr.'wincmd w'
+      return "w"
+    endif
+    wincmd w"
+  endif
+endf