There are freeware programs all over the place that interface with the CM17a "firecracker" and/or the CM11a. Home-Automation.org has a fairly good list of them. I've only ever used Heyu, and that was quite some time ago. Anyway, there's all sorts of good stuff, I'm sure you'll find what you need there.
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Donato
MkII/080000565
MkIIa/010101253
ricin.us