Google Chrome has just taken over the place of Safari on my iPhone.
Hands down it is the best browser I have ever used on a mobile device. The transition between tabs and the ease of closing tabs is excellent. It looks like Google has put a lot of effort into making the user interface simple and fast for users to get the content they want.
The best part is that this uses your google account. When you save a bookmark on your desktop, you can easily find the same bookmark on your phone.
5 Stars from me!