I've tried installing again, from a fresh download and newly formatted USB stick, and still have no sound. To be exact, I am using the TV speakers, and sound is not coming out of them. When I connect a pair of headphones to the jack, I am getting sound out of those, so the TV is getting the sound over HDMI. I've checked all the settings I can find, switched from TV Speakers to AV Receiver and back, tried the built in tuner, still no sound.

I had no problems reverting back to stock for a few days (had sound immediately), and reinstalling the rooted kernel build from USB4.

Just a note on anyone else noticing a sound issue -- I had no sound when I first booted after the root. I rebooted (changed nothing) and had sound when it came back up. I am not going to say I didn't panic for a split second but everything came up golden. Changed my user agent to generic and am happily watching my hulu plus account as we speak. I'm glad to tell playon to kiss off.

Just installed this according to instructions, and after a couple of restarts, it works without a hitch.

I cannot thank you guys enough. You have given me back the product I thought I was purchasing when I brought this box home on release day...when I could visit any website on the internet, just like a proper computer. That's what I was sold in the marketing material, and now, thanks to the hard work of this community, I finally have it back.

I am extremely happy with this project, you guys deserve a lot of gratitude from everyone who bought into this product. I no longer feel resentment when I look at my box...I feel happiness.

Just to say it one more time, THANK YOU!

Awesome! That did the trick, thank you! I feel dumb that it was just turn it off/on, but oh well.

Well I figured out how to do ADB over IP and allowed installing non-market apps. I even pushed Superuser.apk, and it would work except it doesn't have permission to write the su binary.

did you recompile the su for x86? the nore su will not work and therefore neither will superuser.apk

No, I simply sent the superuser.apk from my phone to dropbox, and downloaded it to my GTV Box. The app itself works, but when I try to update the su binary in the settings, it says it doesn't have permission to write it. I suppose I could ADB push the binary to the location it needs to be just to see what happens. I haven't used ADB since I rooted my Droid 1 back in 2009.

You missed the point. the SU binary needs to be compiled for intel x86. The ARM version from your phone will not work

Unfortunately that is beyond my skill level haha.

Sorry that no one has answered you, but no. The USB ports are for external storage. Besides finding an A-to-A USB cable would be difficult in retail hell.
These boxes use ADB over IP. There is a setting in Development under Applications in Settings. Just make sure Remote Debugging is checked. You will use the option "Debugger IP address" to config.