This is a good question. I've watched a few tutorials over at youtube, and it's interesting the number of ways people pronounce the name.
Here are some of the pronunciations that I've heard:-
- Ar *mumble* dino"
- Ard ino
- Or do ween O
- Ar du ween Oh
- Arrr dween o
Many people speak the name like they're attempting to fast-forward a bad track on a CD, or under their breath.
Personally, I call it a Microcontroller.
Perhaps this is something for the "forks" to think about, "Linux" for example - rolls of the multi-lingual tongue with a great deal of ease and clarity, so does 'google' for that matter ... 'Apple' - no problems there.
I think "Arrr dween o" by the simple fact that it's complex to pronounce, will have issues sticking as memorable brand identity, which is a shame since it's such as great product. But, once you learn to spell it correctly, assuming anyone publishing on the web has done the same, the search results aren't confused because it's a completely unique keyword.
Us "geeks" know what it is, but it's nice to be able to talk brands in traditional business circles without twisting people's tongues.
But, perhaps they prefer it if people have a hard time pronouncing it - whatever interpretation you've chosen, will eventually roll off you tongue more easily with time and practice.