Independent broadband-friendly home alarm systems
Some new alarm system vendors now provide IP-based monitoring, so intrusion signals (and in some cases, two-way voice communication) can be transmitted to the security company using the Internet instead of a phone line. NextAlarm.com offers such a solution: a wireless control panel with keychain remote that sits on your home network. Also included are a pair of wireless magnetic door contact sensors and a wireless infrared motion detector. NextAlarm allows its users to install this stuff themselves--and since it's all wireless, you won't need to worry about slinging wires through your attic. The whole system will set you back less than three-hundred bucks, assuming you don't need extra sensors. NextAlarm provides monitoring service, too.
One of NextAlarm's competitors is ProtectAmerica.com, who offers a very similar broadband-capable alarm solution. Completely wireless, ProtectAmerica offers additional sensors for glass breakage, flooding, and low-temperatures. Handy for keeping an eye on that damp basement if you live in the recently water-soaked midwest. ProtectAmerica touts their two-way voice monitoring (through the control panel device) and broadband-compatibility as advantages over a traditional security player like ADT.