Opera Mini approved for iPhone
First impressions:1. it's very responsive. Much snappier than Safari; the difference is very noticeable.2. pages download much quicker3. zooming in and out is faster, but you only have two zoom levels. If you "pinch to zoom" it immediately zooms in all the way.4. the home screen with 9 favorites works great5. it's a little buggy (clicks don't always register)6. killer feature #1: it automatically stores the entire app state, so you can open a few tabs, switch apps, go back and have everything the way you left it. This is a big deal, because Safari forgets your pages eventually, which is so frustrating when you have your travel plans in a safari tab and 3G is not exactly reliable.7. killer feature #2: you can save pages8. In full screen mode it makes for a pretty decent reader.9. It doesn't suffer from "too small font" syndrome.10. It has this "Snap to column" thing where your view automatically snaps to the column edges. This makes reading more like reading on Instapaper and less like safari.11. It loads instantly, even when I have 3 tabs open. It's really that fast.The only real downsides I know of so far are that it has trouble rendering more complex web pages, invades my privacy and doesn't do Javascript. Flash content simply doesn't appear (so you don't even know it should be there) and YouTube links don't link to the YouTube app. Still very impressive.