add a warning.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@42679 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/www/index.html b/www/index.html
index 255c608..c2db94a 100644
--- a/www/index.html
+++ b/www/index.html
@@ -41,7 +41,7 @@
 		</ul>
 		Of course this is only a rough outline of the goals and features of Clang.  To get a true sense of what the new LLVM front-end is all about, as well as why you might want to considering using it, see the <a href="features.html">Features</a> section.
 		<h2>Try Clang</h2>
-		If you are a compiler developer and want to try out Clang, then build instructions are available on the <a href="get_involved.html#build">Get Involved</a> page.
+		If you are a compiler developer and want to try out Clang, then build instructions are available on the <a href="get_involved.html#build">Get Involved</a> page.  Note that clang is still early in development.  If you are looking for source analysis or source-to-source transformation tools, clang is probably a great solution for you.  If you want to use it as a drop in C compiler, it is not yet ready.
 		<h2>Get Involved</h2>
 		If you are interested in working on Clang, then check out the <a href="get_involved.html">Get Involved</a> section.
 	</div>