I expect Matt and his software to be the first to support it
Sounds good to me.
And for everyone else, note that Indigo will likely support the USB PLM, which is not the Ethernet based SmartLinc John is talking about, much sooner. The USB PowerLinc PLM is their power line modem that works like the PowerLinc 2414U but does not have an internal timer or ability to run standalone. It does, however, have the ability to send extended data commands which will improve the performance of link management and add the ability to send some extended data-only commands.
This probably will not be in version 4.0, but supporting the PowerLinc PLM is a high priority.