cejero wrote:1) Thru Indigo can I have RF X10 Motion Detectors turn on INSTEON SwitchLinc V2 (Talking via INSTEON not X10 compatibility mode) or do I have to wait until
Yes. You'll need a W800RF32 and a serial adapter to get the X10 RF into your Mac, then an Insteon PowerLinc to get Insteon signals out. Indigo 1.8 can then handle bridging the X10 RF to Insteon powerline.
cejero wrote:2) I've got 2 switches that control the same set of lights (ie: overhead kitchen lights) and understand that to be a 3-way situation. Do I purchase 1 SwitchLinc V2 and an ICON Dimmer to have a 3-way thing go on or 2 Switchlinc V2s or what... I can't really find an answer to these.
It looks like you can use 2 Icon switches (or any combination of SwitchLinc and Icon) in a 3-way configuration no problem. For a summary of differences between the SwitchLinc and Icon lines, go to Smarthome's
Icon product page, scroll down and click "Click here for more product info" to get a nice little chart describing the differences.
cejero wrote:3) If I have controllable Dimmer switches inplace (INSTEONs) then I don't need to use X10 receptacles in the walls correct? I'm only controlling lights at this point anyway, no HVAC, or coffee machines.. Just lights which i want controlled via motion detectors at sunset and night.
Correct. The switches themselves control the load. If you have existing wiring where a switch controls an outlet that a lamp is plugged into, you want to make sure you never plug anything other than a lamp into that outlet--you don't want to "dim" an appliance. This would apply to ordinary dimmer switches too, of course. (Alternatively, you could get Insteon relay switches, which aren't dimmable, but can switch pretty much anything.)
I have an "X10 motion detectors to Insteon wall switches via Indigo" setup myself, and it works beautifully. If you're willing to do some configuration, Indigo allows you to pull off some pretty complex logic. For example, I have "zones" set up with multiple motion detectors and lights in each zone. Any motion detector in the zone can reset the "turn off" countdown for that zone. I'm also messing around with a custom AppleScript that fades lights on or off over a 90-minute period at dusk and dawn. Fun stuff, if you like messing with that kind of thing.