Insteon support from the Linux MCE project has finally arrived. Linux MCE is open source -
"whole-house media solution with pvr + distributed media, and the most advanced smarthome solution available"
- software for linux. LinuxMCE has recently announced beta support for the PLM 2412s module. This Power Linc Modem (PLM) is a simpler version of the, more common, Power Linc Controller (PLC). It has the ability to send both Insteon and X-10 commands, but not as a stand alone unit.
LinuxMCE provides drivers, written in Ruby, for both the PLM and the EZBridge. The EZBridge "bridges" your Insteon controller to your ethernet network. The EZBridge isn't cheap though ($154.99 at the time of this writing). Being that it's an ethernet device, it could potentially allow you to control your devices while you're away from home.
While this doesn't seem like a huge leap for LinuxMCE, it definitely shows that Insteon won't get left in the dark.