SmartHome is now accepting pre-orders for their INSTEON SeriaLinc module.
MSRP is $149.99, and should be in stock 04/30/2009.
Connect any Serial- / RS-232-compatible devices to your INSTEON network. From whole-home audio to security systems to automation controllers, you can now keep the equipment you already own AND take advantage of a reliable INSTEON network. SeriaLinc is 2-way serial, meaning it can be used to control RS-232 devices or to control INSTEON devices via RS-232 commands.

MSRP is $149.99, and should be in stock 04/30/2009.