The Opera Mini FAQ says:
To scroll by page use the left and right keys. To highlight links, or to scroll by portion of the page, use the up and down keys.

However, there aren't any up, down, left, or right keys on the Pearl. I've tried every keypress and it seems like Space is used for page down. Anyone know how to scroll back up quickly? Thanks.

Just roll the trackball to the right or left, and they should do it for ya. I just learned that today, about the quick scrolling.

I've found that the zero key will page down... I havent found a page up so i use the trackball

If you use your ALT key and your trackwheel, you can scroll quickly. I don't know if this works the same on the Pearl. Worth a try tho. Let us know if it works for you.

Wirelessly posted (Mandizzle's Pearl: BlackBerry8100/4.2.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/107)

Using ALT didn't speed up the scrolling. I just use left and right scroll to go up or down.

Sorry about that. I was hoping it would work for you guys on the 8100 as well.