Ok, i do not think it it will need password control. I am using twitter and something called pachube to transmit the text message's commands. Twitter lets you register your account with your phone number, and that is what phone works with it, the number is also changeable. Basically, u send a text to twitter's number and this updates your twitter feed. The feed is constantly monitored by the device, so if you send living room lights on, then it wil trigger the command. I am trying to make the different devices renameable, and i am pretty sure u can dim and brighten. I will also try to make 256 devices controllable and i will also attempt (i cannot promise) to make it possible to get the status of a certain device (ex: living room lights status)(a text replies on/off/dim/bright). I think making it standalone is a benefit, since if your main controller fails, this is a backup. Also, you wil need a dedicated twitter account for this, but this shouldnt matter since twitters free. And twitter will ensure security, also if you manually update the twitter feed via the site, it should also trigger it. Wish me luck, i will start building and testing in about a week or two when i get my parts in. this device will need to be connected to a router, or i can make it wireless for the customer by installing a programmed router inside the device, and all you will need to do is setup wireless bridging, which i can assist you in. I am also thinking about making a backup battery, i dont no, give me some thoughts, feedback, would you be intrested in buying one...etc!!! LOL