Mercury Browser I believe is the best alt to safari. It not like skydive to where you can get most flash content! But as a browser Mecury is by far my fav, it has Tabs, Full Screen Browsing, a great bookmark scheme, background loading, and the best part is Customizable Multi touch gestures! Example I have a two finger swipe down, to open a new tab, to finger tap on the bottom half to close window. Tow finger swipe left or right to go to respective tabs!
It takes a very short time to get used to and it not as if you have to use a preset Multi touches, and if you don't like it don't have to use it. Has Facebook and twitter integration I believe, a great word search, and countless option that I haven't even got to test out yet! O and THEMES!
There is a lite version try that out but I went straight for the pro, you get all the features. Only bad thing I can think of is having to pay for special themes but that's not really a problem I wouldn't pay for those themes but the stock ones rant bad!