BlackBerry Browser in 4.0 on a BWC 4.0 works with some online banking websites now. I'm able to log onto http://www.cscoop.ca
If you like to browse with images turned on, Reqwireless WebViewer 4.0 is much faster than BlackBerry Browser 4.0.
I think there is usefulness to having both installed. Some sites work better or faster in one than the other. But if you want SPEED
in general, Reqwireless wins much more clearly now that BlackBerry Browser 4.0 is often slower than BlackBerry Browser 3.6.
(Using BlackBerry Browser 4.0 on BES 4.0 works faster than on BWC 4.0 though. Just so you know. However, Reqwireless 4.0 still seems faster, even if it's not ideal for all sites. Reqwireless REALLY shines on certain sites such as http://news.google.com
with images -- it displays everything more than twice as fast as BlackBerry Browser 4.0.)