Hello,
I have made these quick observations about BlackBerry Bold Browser:
Spin trackball
Move mouse cursor. Diagonal movements work properly, unlike in Opera Mini. Faster trackball spins move the mouse pointer incredibly fast (pointer acceleration). It finally feels like a true mouse pointer now, and feels much better than previous mouse pointer in Desktop browsing mode on Pearl and Curve.
Click trackball
Zoom into webpage (until fully zoomed in)
ALT + Click trackball
Zoom out of webpage
SHIFT + Spin trackball
Fast panning around the web page
Adjust mouse pointer speed
I noticed that it was a little obscure to adjust the mouse pointer speed -- it is adjusted in Settings -> Screen/Keyboard (I use 90% sensitivity for horizontal and vertical, I prefer this over the 70% default)
Adjust the amount of zooming before you can edit textboxes, etc
Go into Browser Options, and change font size to a smaller font size such as about 3 or 4. That way, you don't have to zoom in as much before you're allowed to edit text in textboxes. You are allowed to use font sizes as small as 1.
Other observations: On the BlackBerry Bold's high resolution screen, I was even able to just about barely read font size point 1 and 2, which is much more readable than Opera Mini's unreadable zoomed-out fonts. Many AJAX pages don't yet work properly, such as Google Maps (full version), GMAIL (full version), Sprint Captioned Telephone, etc. GMAIL light version worked though. Lots more webpages seem to work properly than on previous BlackBerries, and seems to preferable to Opera Mini on first sight (once optimized, and learning curve for new keypress shortcuts completed). The new browser appears to show a lot of promise. Performance during heavy Javascript processing should not cause the device to freeze or menus to be sluggish -- i.e. loading
Google Maps and then later trying to access BlackBerry Bold's menus. With this page, it grinds to a laggy crawl with the spinning watch (the Bold equivalent of the hourglass)