Added explanation on move to Savannah and URLs to its project pages.

README

@@ -22,11 +22,34 @@ lwIP features:
 
 lwIP is freely available under a BSD license.
 
-For more information, go to the lwIP homepage at 
-http://www.sics.se/~adam/lwip/
+lwIP has grown into an excellent TCP/IP stack for embedded devices,
+and developers using the stack often submit bug fixes, improvements,
+and additions to the stack to further increase its usefulness.
 
-The official development tree of lwIP is hosted
-at http://savannah.nongnu.org/projects/lwip/
+Development of lwIP is hosted on Savannah, a central point for
+software development, maintenance and distribution. A core team
+will improve lwIP by the use of Savannah's interface and CVS.
+
+The current lwIP CVS tree can be checked out by doing:
+  cvs -d:pserver:anoncvs@subversions.gnu.org:/cvsroot/lwip login
+  cvs -z3 -d:pserver:anoncvs@subversions.gnu.org:/cvsroot/lwip co lwip
+
+Last night's CVS tar ball can be downloaded from:
+  http://savannah.gnu.org/cvs.backups/lwip.tar.gz
+
+Submit patches and bugs via the lwIP project page:
+  http://savannah.nongnu.org/projects/lwip/
+
+Stable releases have not been released yet. For development we
+suggest downloading the latest CVS and keeping track of the
+lwIP mailing list.
+
+The mailing list (and archives), as well as Adam Dunkels' papers
+on lwIP can be found on the official lwIP home page, which is
+  http://www.sics.se/~adam/lwip/
+
+Reading Adam Dunkels' papers and browsing the mailing list archives
+is a good way to become familiar with the design of lwIP.
 
 Adam Dunkels <adam@sics.se>
 Leon Woestenberg <leon.woestenberg@gmx.net>