I'm also really interested in this module.
Any news on this, Till?
Another question that has already been asked in this thread, but wasn't answered:
Will it only support domain name registration?
More options would be:
DNS Management (e.g. godaddy / hetzner as secondary dns)
SSL Certs Management (generate keys and certs - with option for SNI for multiple domains - transfer to CA for signing, bundle it and apply to websites)
For SSL Certs there might be more than only the DNS providers, e.g. StartSSL