With my ISY less than a week out of the box, I was able to install several Insteon dimmer switches, a keypad and an assortment of other stuff. The lighting control is great, but integrating the keypad with Sonos (following this guide) brings it to a whole other level of awesome and my wife is now a believer (small miracle). Thank you to all of those who have contributed to this thread and the other ISY-Sonos threads. Couple of points for any newbies looking to do this:
1. It isn't that hard, just take your time and have a little patience.
2. If you want to do something like assign a keypad button to play a specific pandora channel, read this thread (http://forum.universal-devices.com/topic/8121-sonos-on-a-keypadlinc/) and this one (http://forum.universal-devices.com/topic/14920-how-to-control-sonos-streaming-radio-stations/) and definitely download the Device Spy software, it makes it a snap along with the great instructions from chrishick and others. Once you get the basic concepts following those instructions, you'll discover you can do a lot of cool stuff.
3. The link to Device Spy in one of the threads was outdated, here is a current link: http://www.meshcommander.com/upnptools
4. It would have taken less than 30 minutes to do all this, if I hadn't beaten my head against the wall with reverting IP addresses... word to the wise: don't forget to Save your network programs when you make a change AND then click SAVE AGAIN from the main programs screen. I kept going back and forth wondering why my ip address changes weren't taking.
So glad I didn't shell out many thousands for Control4! I will make a request of Universal Devices, or someone on these forums. Someone needs to create a very basic video introducing installing and configuring the network module and then briefly going through each of drop down choices and providing some syntax examples. Some are obvious, others are not.