There are a few things that you can do to significantly increase the speed of the BlackBerry Browser.
Turn Off Show Images: Downloading images takes a lot of bandwidth, and strains your BlackBerry when loading them. From the Browser Options --> Browser Configuration screen, set Show Images = no, and uncheck "Use Background Images".
Note: You can easily download the images for any page by pressing "M" for more images, or "Q" for all images. These options are also available from the menu.
Turn Off JavaScript Support: Some JavaScripts are very large and can't be processed by your BlackBerry anyways, so turning off JavaScript support will not only save on bandwidth, but on processing time by your