We've already seen the leak of an official release of Windows Mobile 6.5 for the HTC Touch Diamond 2. Now HTC has released the ROM itself, with the following versions for the following regions:

  • Germany: 2.16.407.1
  • Denmark: 2.16.403.1
  • United Kingdom: 2.16.405.4
  • Sweden: 2.16.413.1
  • Norway: 2.16.409.1
  • Portugal: 2.16.410.1

The usual reminder that these are full-on ROM upgrades, and so you need to back up your data elsewhere first. Otherwise, go get it here.