It looks like a new update for ECS, a popular home automation software package which runs on Windows & Linux, has been posted (2.3.29) online, and now supports Insteon using the serial version of the Powerlinc V2. If you aren't familiar with ECS, check out their website, which also includes an impressive list of hardware it supports, and some screenshots of what it can do.
OmnipotenceSoftware.com
OmnipotenceSoftware.com