If you don't like the rotation, then this might be the opera for you
http://forum.ppcgeeks.com/showthread.php?t=55435
For tweaks this is what i have done.
in the browser type in "opera:config"
All these are under "user prefs"
Turbo mode: checked
smooth scrolling: Checked
tab increase: 7
Automatic Ram cache: checked
First update delay: 0
Cache Directory4: changed to my sd card location example "\storage card\cache"
then i would set the cache size to 10mb in the settings menue
This made opera load so much faster with much less checkered boxes.
I updated to 15445 but i still cannot get the zoom slider or flash to load.
I still cannot find a away to load tabs in the background
I hope these tweaks help.
Edit: Installed flash lite 3.1. Youtube now works
Now all i need its the scroll bar and tab in background