my 2˘,
Yes, z-wave does have some pretty neat stuff, including the schlage lock in the occupancy sensing thread. Many of us have known about that lock for some time now, and at least two users here are locksmiths. That post over there and the intro to this thread sounded a lot like sales pitches.
That lock unit is very pricey for what we do here at the x10 forums and I'd imagine the folks at cocoontech are probably all over it, as is "my green house" (micasaverde).
When it's said that "you get what you pay for" and x10'ers are "lemmings", I, personally, take offense.
I'm certainly not a lemming, and try to be objective to all HA technologies at the site I run. With that in mind, I have invested much time and money into my x10 system since February 13, 1988. My last count had me up to 170 x10 units in my home including many powerflashes, controllers and UM506's. My system has missed 3 commands since the beginning of 2009, and it's very reliable.
Granted, it wasn't as easy as x10 said it would be.
Zwave isn't without faults (from what I have read), and having a champagne HA system on my beer budget gives me great satisfaction, which is why I offer my feeble assistance here, when I can.
X10 isn't for everyone, and those without the patience may fare far better with another system, but you won't catch me trying to sell it. To do so would jeopardize my impartiality.
Is micasaverde right for you? Depends on how much you want to spend. Can something like that be done with X10? Depends on how inventive/handy you are. Again, be prepared to spend time and money on something that micasaverde does more or less right out of the box.