John, thanks for the update, I've got the token issue going on as well. Any timeframe on the hotfix? Everything was running smoothly this morning, and then I came back from lunch and haven't been able to get anything done with eBay/SixBit since.
Edited to add: I no more than typed this, and tried again and I could get new listings and revisions to go. So if it is that their authentication server is getting overloaded, then it may just be hit and miss for folks trying to list or revise for now.