I've been using alternate browsers for some time, mainly because I wasn't at all satisfied with Safari's tabbed browsing. I've used iCab quite a bit on my iPad, and like it a lot. I've also been using a preview copy of 360 Web Browser ($0.99), with version 3.0 finally being released in the App Store yesterday. This version is optimized for the iPad. In addition to tabbing, other features of this browser include the ability to play and download Flash files, Dropbox support, syncing with Firefox, plugins, download manager, custom themes, multi-gesture support, full screen mode, ad blocking, Airport support, and literally a couple hundred other features. Quite amazing. If you want a powerhouse, 360 Web Browser is for you. There's also a free version, 360 Web Browser Lite.