I have installed Opera 10 using "Ninja Duck Opera 10 (BASE-FL-RO-XXX) 1.3.cab" and it work very well for me included: Flash (youtube...), Auto rotate using G-Sensor, auto hide virtual keyboard when I use hardware keyboard.
Now I'm using Opera Mobile 5.1 because of it performance: very fast and display is good for most sites but lack of support: Javascript, Flash.
@NRGZ28: Please consider to bundle Opera Mobile 5.1 as default browser in your ROM, I hope so
Thanks for made great job!