Insteon Plugin is available here
Device and Group change notification with level tracking.
Device and Group control with support for On, Off, Level, Dim, Bright, Start/Stop Change, Fast On, and Fast Off commands.
Automated device detection from existing links.
Device naming and management.
Auto device discovery (device type/firmware/on levels/ramp rates/x10 address).
Create groups electronically (ie no manual linking).
Use the PLC as a group controller.
Manual link editing and management.
Automatic retreival of device links and group information.
Read and write to a device's internal memory.
Monitor all INSTEON traffic and events.
Below are screen shots of the interface so you can see how things are progressing