I said no new features till after the 0.51 release.  Well, I lied.  This is a
vi editor for busybox, contributed by Sterling Huxley <sterling@europa.com>.
It adds 22k to the busybox binary when enabled.  Quite impressive!
diff --git a/Config.h b/Config.h
index bd63665..44fcbed 100644
--- a/Config.h
+++ b/Config.h
@@ -120,6 +120,7 @@
 //#define BB_UPDATE
 #define BB_UPTIME
 //#define BB_USLEEP
+//#define BB_VI
 //#define BB_WATCHDOG
 #define BB_WC
 //#define BB_WGET
@@ -334,6 +335,17 @@
 #define BB_FEATURE_TFTP_PUT
 #define BB_FEATURE_TFTP_GET
 //
+// features for vi
+#define BB_FEATURE_VI_COLON		// ":" colon commands, no "ex" mode
+#define BB_FEATURE_VI_YANKMARK		// Yank/Put commands and Mark cmds
+#define BB_FEATURE_VI_SEARCH		// search and replace cmds
+#define BB_FEATURE_VI_USE_SIGNALS	// catch signals
+#define BB_FEATURE_VI_DOT_CMD		// remember previous cmd and "." cmd
+#define BB_FEATURE_VI_READONLY		// vi -R and "view" mode
+#define BB_FEATURE_VI_SETOPTS		// set-able options,  ai ic showmatch
+#define BB_FEATURE_VI_SET		// :set
+#define BB_FEATURE_VI_WIN_RESIZE	// handle window resize
+//
 // End of Features List
 //
 //