That said, I agree with John Gruber when he writes on Daring Fireball:

Worst of all: scrolling. The iPhone uses a heuristic when you flick to scroll, such that if your finger is mostly moving up or down (or left or right) it locks you into that dimension when scrolling a view — such as a zoomed-in web page — that could be scrolled in any dimension. The effect is that when you’re zoomed in on a column of text in MobileSafari and flick “up” to scroll down, the view moves straight down, even if your flick gesture was a few degrees off. On Opera Mini, however, scrolling a zoomed-in view moves in exactly the direction of your flick gesture. The result is that scrolling an Opera Mini page feels like sliding a sheet of ice on an oil slick.

via Approved.

Now, we’ve made the fastest browser in the world even faster. Opera’s new beta is quicker to start, faster at loading Web pages and better at running your favorite Web applications.

Opera today released the beta preview of Opera Mini, the newest version of the award-winning browser that works on almost every mobile phone. Opera Mini 4.1 improves the way Opera Mini interacts with your phone to make browsing more convenient, more productive and definitely more fun. Opera Mini is available to download for beta testing at http://www.operamini.com/beta

They have a video Opera Mini 4.1b Guided Tour.