Bitstream has recently updated it's Windows Phone browser, Bolt, to version 2.1. The update adds support for HTML 5 Video and throws in a little Facebook integration. The Facebook integration in Bolt 2.1 allows users to paste links directly to Facebook accounts and work the Facebook's instant messaging.
Bolt 2.1 continues to utilize the server-side rendering of pages to speed things up. Version 2.1 has a little more zip to it than previous versions. The first 25% of pages does take a few seconds to load, then the remaining portions load in a flash. Also, remember that Bolt is a Java App and will be installed within your Java program.
The layout still needs some work (fonts still a little on the small size even when set to XXLarge) but the speed is definitely present. You can download your free copy of Bolt 2.1 by going to http://boltbrowser.com/bolts2.jad from your mobile browser. Additional installation instructions can be found at the Bolt Browser website.