diff --git a/README b/README
index 8ddf949727..bc869ed45a 100644
--- a/README
+++ b/README
@@ -124,6 +124,9 @@ base as of this writing (26 Aug 2005):
   statically linked, it is recommended you compile Open MPI with the
   --without-memory-manager configure option.
 
+- The XGrid support is experimental - see the Open MPI FAQ for more
+  information.
+
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 Building Open MPI