diff --git a/readme.txt b/readme.txt
index 44a322f71..2db2814da 100644
--- a/readme.txt
+++ b/readme.txt
@@ -123,9 +123,13 @@
   3484947)(backported to 2.4.1).
 - FIX: Fixed various minor documentation errors (bug 3484942)(backported
   to 2.4.1).
-- NEW: Added HSE oscillator bypass capability to the STM32 clock
-  initialization, it is enabled by adding STM32_HSE_BYPASS to your
-  board.h file.
+- NEW: Added an abstract interface for serial devices in the HAL. This
+  interface is meant to replace the equivalent class present in the
+  kernel. access macros are similar except for the prefix, "ser" instead
+  of "chIO".
+- NEW: Added an abstract interface for block devices in the HAL. This
+  abstraction layer is meant to unify the access protocol to the SDC and
+  MMC_SPI (and potentially others) device drivers.
 - NEW: Updated the MSP port to work with the latest MSPGCC compiler (4.6.3
   LTS 20120406 unpatched), now the old MSPGCC 3.2.3 is no more supported
   (backported to 2.4.1).