There’s also old school companies surfing the neurowaves.

Increase home security and let visitors in more easily with this electric door strike designed specifically for deeper Schlage-brand locks. This 12VDC Schlage compatible door strike replaces your existing strike plate with an electro-mechanical release mechanism. Simply wire one in series with a low-voltage push-button switch an X10 Universal Module(Item#sh2010) or the relay release of an intercom system and your visitors will be able to push or pull the door open when power is applied. You can also connect them to a keypad alarm system or other entry system. 16-Volt AC Power Supply(Item#sh5191) sold separately.

http://www.securedhome.com/sh5190s.html