Nice! Is it tied into the 10 or z-wave system in any way?
No... not now... and it might never be. (see below)
Determining which direction and/or automation to pursue has always been difficult for me. I find it easier to solve problems... than to creatively modernize.
..... I believe the wireless monitor has an alarm and a relay. You can use the relay with any system you want (like the X10 PSC01 powerflash module).
I also thought there was a relay too! But... apparently... not with the Mighty Mule. I think that might be the Chamberlain CWA2000.... which was also a consideration.
I could pop open the monitor and see if the is a way to create a relay. I feel confident there is as the alarm/monitor has a volume level adjustment.
This will help with people driving in, but it won't help with walking visitors. I don't know if that's an issue for you, but that's where I stopped because I wasn't sure if vehicle notification was sufficient or if I also wanted people detected.....
Actually I also have people detection. Although isolated away from traffic. And I use a camera system as well....
I live in a nice area... so whereas security is always a normal concern... the driveway alarm was mostly for convenience sake.