bobcousins:
I find it interesting, from the novelty side at least. I am still worried about the lack of real peripherals, what happens when I want 16 peripherals? I haven't counted, but for a sizeable project that must be a limit. Having said that, I would quite like a dedicated "stepper driver peripheral".
That was also a concern of mine. Peripherals are already implemented in software for propeller-1. One core can handle several USARTs. The upcoming 32-bit propeller-2 will have 16 cores, which means you can have more peripherals than any Arduino board!
bobcousins:
I see that Parallax also have an IDE, I guess it can download as well. That kinda raises the question, why not use the Propeller IDE for programming it?
Parallax invented "Spin" for the propeller-1, but that does not interest me. However, for the propeller-2, Parallax is developing C! Why re-invent an IDE when the Arduino IDE handles C. Bottom line: an Arduino board featuring the propeller-2 sounds very interesting.