well, arduino can only take you so far and is limited in where you could go. I've known arduino as a prototyping platform only and there's very little you can g

well, arduino can only take you so far and is limited in where you could go. I've known arduino as a prototyping platform only and there's very little you can go after that. I'd start with the EVK because it has the temperature and light sensor on the board built in. GainSpan did a demo recently to control the board over an iPhone. This is something you can only do with Wi-Fi. Well, once the prototype is done, you should be able to buy the module and look into the module datasheet to develop your own products. Also, note that GainSpan modules currently work with Freescale MCUs so you get access to their customer support team as well. (Basically you could turn on the ARM core in the GainSpan chip or use an external MCU.)