Just for info the page quoted in this post is regional. I checked my device using this page and it said it wasn't for my device. When I went to the UK page it accepted my serial number and showed the following updates:
Norway:1.66.409.1, Spain :1.66.412.1, Denmark:1.66.403.1, France :1.66.406.1,
Sweden:1.66.413.2, Italy:1.66.408.1, WWE:1.66.405.2
I think the 1.66 is the version and the rest of the numbers are regional/operator specific.
I have just got my phone from Virgin last weekend and it has ROM 1.66.405.2 (76641) WWE. Good to know I can update when a new one arrives as my last Diamond on Orange was locked and I couldn't get past 1.93 with it.
Damiantmc, on Jan 23 2010, 20:53, said:
Just a quick one to let you guys know that HTC have posted a new ROM on there official support page for the HD2,
This ones dated 22-01-2010 and is version number: 1.66.707.1
Grab it from here,
HD2 Updates on HTC's support site