It's been customized for large screen tablets, and it comes with all the same great features that Dolphin include in all versions of their browsers: gestures, add-ons & plug-ins, multi-touch-zoom, tabs, and sidebars.
Needless to say, the Dolphin browser is my preferred browser. The new beta version is only available in the Android Market, but that's not the problem that it used to be. There's only a handful of devices running Honeycomb, and all the legit ones have market access. Even the hacked Honeycomb firmwares come with market access.