Have a look at THIS THREAD which came out when Version 7 was due to be released. It's a long one, but I found loads of useful stuff in it, and most of the questions will apply to Version 9 as well.
Good point, I was maybe thinking of the upgrade process. Doesn't the initial unlock process try to go online as you register though, I can't quite recall...
There appear to be lots of confirmations that v9 is out in one format or another (GPSIreland.ie message board thread has someone saying they have it on a 660, and that the Irish coverage is very good). I've also seen links where you can buy it on SD cards already.