fat16lib:
The USB port on Teensy 3.0 is capable of USB host mode. A Micro-AB connector allows future use of USB host mode.
Initially, Teensy 3.0 will ship with only USB device support. USB host support, integrated in the Arduino(R)** environment with easy-to-use objects, is planned as a software-only upgrade in 2013. Programming a project using USB host mode will require a second Teensy 3.0 and a board-to-board link using the I2C pins (2 wires and ground), to provide a path for the Arduino IDE to upload code.
Teensy 3.0 uses a Micro AB connector, not a Mini connector.
Thanks for that. I didn't see it mentioned anywhere on their site and on their existing Teeny boards they state:
The Teensy is a complete USB-based microcontroller development system, in a very small footprint, capable of implementing many types of projects. All programming is done via the USB port. No special programmer is needed, only a standard "Mini-B" USB cable and a PC or Macintosh with a USB port.
So you can see my confusion? Or not. 
Lefty