Darin is not going to have time before Firefox 1.1 to implement a mechanism to whitelist top-level domains where Unicode can be safely displayed, and I probably am not either. So someone who is comfortable hacking on Mozilla needs to, if Firefox 1.1 is going to have any IDN Unicode display support. I can provide guidance as to what needs to be done. Get in touch if you can help.
I might take a crack a this. I posted a comment in the bug with a technical suggestion, is that more or less what you’re looking for?