thanks to xtep over at xda dev for the latest Omnia Opera build 15746. there are other higher version of opera from htc, but i've found the omnia builds are always much faster than the htc versions of opera.
here the vga versions that i've put together (installed into internal device):
vga version (cache directory set to internal storage):
http://www.megaupload.com/?d=X4ERZ025
march 10th update: fixed zoom in full mode
march 6th update: set network buffer to 6mb. for those who already downloaded and installed the cab, i recommend you set your network buffer to 6mb. this will improve page render performance a lot. to do this, type "opera:config" into your browser address bar, select performance and change network buffer to 6mb. i have already updated the cab.
for other installation options and qvga version go here:
http://forum.xda-developers.com/showthread.php?t=475986