The basics are the type of connection that your cameras are going to be set up with. Are they going to be hooked up through a camera DVR or through a PC? What is the normal viewing and playback for the camera system (dedicated application or an internet viewer)? The interface with your phone would be dependant on the camera set up. The easiest to set up (for your droid x) might be through an internet viewer that you would be able to access through the browser on your phone (thanks to the flash player). If you have a security company doing the installation, they may have an app already created for your security application. Feel free to PM me if you don't want to post specific information on an open forum. The key is, that your cameras would have to be connected to the internet or a local server that you would be able to access remotely.