Got it, and used it already. I've had a little database trick watching for functioning newsbox hitcounters, anyone that hadn't recorded a hit in 2 days went into a list. I sorted out the accounts I'd already locked, and then the rest got compared with your notes. I locked 11 more sites, emailed 4 about fixing their newsbox, and deleted 2. That's all in phase 2. I haven't dealt with phase 1 yet either. I'm really thinking it's more dead accounts than alive, as such, I think I may just wait for the migration to sort it out. I only have to deal with the accounts that actually respond to the migration email. :-)
Thanks again for the list, I'll be comparing notes against it as people verify their accounts for the move.