Just ran across this post from an Cyanogen Mod dev in my Google+ stream...
Well, my TouchPad followers are in luck it seems. Since I can't unlock my TF700, I am going to return it.
Asus has had this same problem with 3 different models(released months apart) and they still can't fix these unlock and OTA issues. Asus' response to support inquiries is that they do not support the unlock tool....nevermind the fact that I can't get OTA updates either. I could exchange it but there are many people that have had to exchange tablets 3+ times to get one that will unlock.
In addition, all the Tegra 3 Transformer models have poor I/O performance. The TF700 is somewhat memory constrained since it is driving a 1920x1200 display. This all leads to relatively poor performance for my use cases.
Despite absolutely loving a tablet with a keyboard dock, I can't justify spending $650 on a device with these problems. So, the TouchPad will now be my primary tablet which means I'll be doing a lot more development on it than I have over the last 4 months or so.