Right, after trying many versions of Android, and struggling to find one that was fully stable with no issues, I have taken the plunge and I am now running, wait for it...
WINDOWS PHONE 7 on my HD2!!!
Everything working, including live services.
DarkForcesTeam have released a working ROM and after a few tweaks (Dev Unlock, XAP installer, TouchXPlorer and a reg edit), it seems fully functional!
AWESOME! Google DFT WP7 ROM (the DFT site is in Chinese but if you use Google Chrome, it'll autotranslate for you)
It's not fully functional though is it? The marketplace doesn't work, along with any other "cloud" services?