While people who are frustrated with X10 are anxiously watching INSTEON, the fact is you can't yet fully automate your home with INSTEON devices. Not only is broad software support still lacking, several important types of devices are still missing.
For example, you won't find an INSTEON-based motion detector. You can get a remote control, but not one that's integrated with your home AV equipment. In How to control Insteon devices with an IR remote control Johnnynine describes one small step towards integration.