You can download it here
Mostly minor changes, although APM folks who use the Serial Monitor will appreciate the increased control there.
- SPI library.
- The Ethernet library has been refactored to use the new SPI library. Existing sketches will need: #include <SPI.h> added to the top of their code. Just select SPI from the Sketch > Import Library menu.
- String class
- A0, A1, etc. aliases for the analog input pins
- shiftIn() function
- Added Arduino Pro 5V and Arduino Fio to the boards menu
- Added control over automatic scrolling and outgoing line endings in the serial monitor
Full release notes are here.