The number of pins on the Teensy++ is amazing!
It is. And the price (in my opinion) is quite reasonable.
With pins, they work well on a breadboard.
Without pins, it's very easy to solder parts and wires right onto the board.
Have you tried running arduino .pdes on the Teensy?
I have and it's gone very well. I am very pleased with the product. I followed the instructions below and was running "blink" within 30 minutes (downloading and installing took most of that time)...
However, I've tried just one library; the Tone library. It does not compile. I suspect it's a simple problem.
On an unrelated issue, I emailed for support. It took a few days for the reply but Paul Stoffregen provided a very detailed and very helpful response. (Got to love it when the person who designed the thing replies in person!)
I can imagine I might have a few headaches trying to run firmata on it without some changes.
If you build a simple test with easy instructions I'm willing to run a test for you.
I see Tx and Rx pins on the board so I am assuming I can interface with an xbee fine.
I suspect that will work well. One of the advantages to the Teensy is Tx and Rx are not used to communicate with the host computer.
I am a bit confused by the info on the site regarding ADC. In places it mentions that the Teensy++ has 10bit ADC, but the (original?) Teensy is described as having [no] analog input pins. Does the Teensy have analog input pins but no ADC?
The "original" Teensy had no analog inputs. The Teensy currently for sale does have analog inputs. The Teensy++ has always had analog inputs.
But maybe he is referring to an older version of the board.
He is. I have an "old" one and it does not have analog inputs. The "new" one does.