This is a slightly different topic, so I thought I'd just split to another post.
Regarding integration with Indigo... I got the plugin up and running last night. I had trouble with the Ethernet version, so I'm connecting to the serial port via iTach device. Generally works well. You can add each load as a device in Indigo and the updates are very fast (faster than Insteon, let's just say that
The keypad button/scene integration is probably a work in progress. Each button is added as a device (on/off). Activating a scene in Indigo works great. Activating a scene outside of Indigo (i.e. pressing physical button or using Lutron app) works well too, with the scene status updating in Indigo promptly (switching to 'on' - reflecting the keypad LED basically). What it doesn't seem to do for me yet is shut the keypad buttons OFF in Indigo.
Example: Go into media room, turn on 'enter' scene. Loads adjust, led lights on 'enter' button on keypad, loads are accurately updated in Indigo, and 'enter' scene in Indigo goes to 'on'. Then, switch scent to 'movie' on keypad. Loads adjust, led on 'movie' button lights, and led on 'enter' button shuts off. Loads are accurately updated in Indigo, 'movie' scene in Indigo goes to 'on', but 'enter' scene in Indigo does NOT go to off, it remains ON.
Now, I only got this running last night, and haven't messed around too much, so maybe I've got something wrong. I'll keep this thread updated as things go on.