As most of you already know, Opera Mini was approved by Apple yesterday. It's faster than Safari for the most part and the built-in search function is a welcomed addition. That said, it's not without its share of issues. In my experience, some sites don't render properly and there are privacy/sercurity concerns due to server-side rendering of the webpages.
Have most of you tried the browser yet? If so, what do you think? Will it replace Safari on your iPhone or iPod Touch? Personally, I'm using both. I love the speed of Opera and how you can browse back to previous pages instantly (without a new page load). As for sites that require "sensitive" log in info, I simply use Safari.