We have had some decent wins this morning, which is about time, yesterday was a complete grovel.
Front end of the domain management interface has largely been sorted - this is the interface resellers use to manage their domain names.
Back end of the domain management interface has largely been sorted for the major registries. This is the part that interfaces with the various registries for registration, transfer etc.
Tying those two systems together are a bunch of automated scripts. These appear to be missing. Our engineers are working on restoring/rewriting these. That should be the final step from what we can see we can see before a general release, pending final testing.
WHOIS we've recovered what we need – and I'm relatively confident are close to getting that up. I'll have a further report on that soonish.