The mounting holes alone make this new revision worth waiting for.

It's also nice to see the additional GPIO output which can be used either as an additional I2C bus or used for I2S (digital audio) output. The latter should be very useful for those who want to use the Raspberry Pi as a media center PC as it's trivial to convert I2S to S/PDIF or Toslink (optical).

Finally, I'm glad the GPIOs have been changed to expose the missing JTAG debug symbol. Having proper JTAG support makes low-level development far, far easier.