I'm new to Z-wave also, even though I live here in ControlThink's back yard.
I have been following Zigbee for a couple of years and had plans to start automating my new home with Zigbee as soon as I got moved in. I had done some reading and had visited various Zigbee booths at C.E.S., but I could never find any good DIY information on the Internet. Well, I had an unpleasant encounter with a Control4 rep this year at C.E.S., and now I know why there's no DIY community for Zigbee: Control4 is the main supplier of Zigbee-based home automation products; they've gone beyond the Zigbee standard on their controls with their own proprietary commands; the only way to talk to a Control4 product is with their proprietary software; the only way to get their proprietary software is to become a Control4 certified installer. The rep was pretty smug when I lamented that Control4 had locked out the do-it-yourselfers.
I decided that I wasn't in love with the idea of a Zigbee home any more, and as soon as I got back from the show I went looking and found Z-wave and ControlThink. So far it looks like Z-wave is open to DIY's, and I guess it will remain that way as long as new products come with white papers of their command sets, and as long as ControlThink incorporates those command sets into their inexpensive software.
This interview at Z-Wave World has me a bit concerned. I thought that the Lagotek HIP100 wall-mounted controller looked pretty cool and would be fun to interface with, but this guy has no intentions of catering to the DIY community. Let's hope that he changes his mind. Notice that Lagotek's primary product is software, not hardware, and most DIY's don't want to spend a lot on software.
What appeals to me about ControlThink is that although their focus is software, they don't seem to mind selling it cheap to DIY's. And being a member of the Z-Wave Alliance, they've got access to all the white papers for the new products.