[ros-users] New speech and 3d head tracking tutorials availa…

Hello,

I have posted a couple of new ROS tutorials for those getting started
with either speech recognition or controlling a pan & tilt head:

* ROS by Example: Speech Recognition and Text-to-Speech (TTS)
<http://www.pirobot.org/blog/0022>

* ROS by Example: Head Tracking in 3D (Part 2)
<http://www.pirobot.org/blog/0023>

Please let me know if you run into any bugs.

--patrick