According to the recently updated timeline of Microsoft's NoDo Windows Phone 7 update, there are only two networks around the world who are still in the "testing" phase for the software rollout: Telefonica in Spain, and Telstra here in Australia.
The good news for Australians is that Optus has moved past the testing stage and into the "Scheduling" stage, which Microsoft informs us generally takes up to 10 business days, meaning Optus WP7 customers should be getting NoDo within a fortnight.
As for Telstra customers? A quick look at the update page on its website shows that there's no more information about when WP7 customers on NextG can expect the update. Hopefully not too far away though.