diff --git a/README.md b/README.md
index 0cb3b2a..8de24a5 100644
--- a/README.md
+++ b/README.md
@@ -92,5 +92,6 @@ Version 2 is significantly different from the initial release. The highlights of
 * ability to load class files(for custom DataAdatpers) from external jars/locations
 * ability to join (or re-join) a job in progress
 * ability to recover from coordinator failures
+* pluggable mechanism to track "seen pages" to handle massive crawls
 * pluggable mechanism to "fetch Pages" in SpiderThread (thus allowing non-web/filesystem extraction jobs)
 * piggyback heartbeats on other messages and only send HB if needed