My HT-RC180 (which is essentially the same thing) does not show these problems. In fact, I think it's performance is quite stellar considering I am hammering the network connection to it while developing my iOS application.
This is also after repeated power cycles. I did not mess with the network control function, but I do have mine set up with a static IP. My issues mostly have been loss of sound problem others reported here. That's been fixed now and I have been quite happy with the last firmware update.
Now the 708 is another issue entirely, the network stack on that is very twitchy.
Edit: Now I see you may have written 807 instead of 708.
Well here's my findings on the 708:
I had the Initializing problem from right out of the box. My DHCP setup which serves out IP's between 192.168.1.2 and 192.168.1.20 works for all my devices in the home. The Onkyo will sometimes get an IP by the "unplug & replug" method, but it gets an IP of 192.168.0.X (where X is some low number). I have NO idea where that is coming from, but I do believe it is messing up the IP address it receives over DHCP. Once I changed it to a static IP, all the of the initialization problems went away.
Here's the other issues I've found:
1. Network stack dies unexpectedly. There are two causes for this. First is by sending a large message. If you send it a large packet, you will kill it. The usual behavior to this is while you may be able to connect via network control, the AVR will not respond to any commands. I've also seen it dead for no apparent reason after the AVR has been idle overnight. I've also run the app I've been developing that polls it every 100ms and had that run overnight and it was happy in the morning. If these occur, only a plug-pull fixes it.
2. Somewhere, something messes up and the AVR can no longer communicate with any streaming protcols. This is where the AVR behaves normally, sees the song title and other info, starts buffering then pops an error message "Cannot start ..." and skips to the next song - and this continually repeats. Only a plug-pull fixes it.
Considering my experiences with my 180 in the past, I have little doubt this will be fixed or improved as future firmware updates are released. My 180 went from a weekly case of frustration to a solid AVR that I no longer need to worry about. I hope the 708 does the same, because I really like it so far.