Just got this response to my ticket:
Blizzard wrote:
This is the latest response from Customer Support:
Heya!
Thanks for the heads up. There is a known issue with characters on Nesingwary right now, but the script to fix it up is being run as we speak. Everything should be gravy by the end of the day at the latest. Thanks for your patience with this! We really appreciate it =]
You may see some characters you've deleted in the past show up again. Go ahead and just re-delete them if you so desire;] If you run into any renames, you should be able to rename your character to the name it had originally =]
Regards,
Game Master Bralphrie
Blizzard Entertainment
Battle.net/support
My missing characters haven't shown up yet. Hopefully they'll be there in the morning.