add another link.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@40512 91177308-0d34-0410-b5e6-96231b3b80d8

www/index.html

@@ -11,6 +11,12 @@ A <a href="http://llvm.org/devmtg/2007-05/09-Naroff-CFE.mov">video</a> and
 <a href="http://llvm.org/devmtg/2007-05/09-Naroff-CFE.pdf">slides</a> are 
 available.</p>
 
+<p>Some more motivation, details, and performance numbers are in the second
+half of Chris' <a 
+href="http://llvm.org/pubs/2007-07-25-LLVM-2.0-and-Beyond.html"> LLVM 2.0 
+and Beyond!</a> talk, which describes how the clang preprocessor can be used
+to make distcc 3-4x more scalable.</p>
+
 <p>To get and build the source, please follow <a 
 href="http://lists.cs.uiuc.edu/pipermail/llvmdev/2007-July/009817.html">these 
 directions</a>.</p>