If you were a big fan of the old Netscape browser, its successor SeaMonkey, has released a 2.0 version. SeaMonkey has updated is core rendering engine to the same that is being used in Firefox 3.5.4. A short review can be found here on The Register.
The browser seems a lot snapper. However, not many of the cooler themes have been updated to 2.0 yet. So you may be stuck with some of the uglier skins for a while.