I know it's been asked before, but I'll put another "+1" in for multiple Z-wave controllers. I would like to have a controller (for example) in each of my distant out-buildings.
I could easily get few Serial-over-Ethernet adapters that allowed me to put additional controllers in my garage, one in my shop, and one in the pool house - I have less than 3ms latency on the ethernet to all those locations but they're all completely out of range even for extenders or other Z-wave hacks. Then I could manage all of those locations from a single Indigo instance. Currently I manage none of them since I don't want the headache or cost or running multiple computers in the various locations. There are quite a few ways to share USB/serial over ethernet, and I won't get into them here. It just matters that Indigo doesn't try to be clever about how to talk to serial ports, and uses the standard interface API so that the various hardware/software shims could be used to stretch the signals out across the network.