Camino, my favorite Firefox alternative that's OS X native and Mozilla-made, just reached 1.0 alpha status. The list of changes in the release notes is massive: faster page drawing speeds, new certificate management, downloads list saved between sessions.. let's just say that nearly every facet and function of the browser has received improvements, upgrades or new features. Go snag a copy at CaminoBrowser.org
or peruse the full release notes
if you have the time.
On a side note: Since Camino is essentially a fully ported version of Firefox for OS X using both the Keychain and Services, would any heavy Firefox users out there want to chime in and let us know how well it performs, and if it plays with Firefox sites nicely?