Firefox 1.5 beta One is out for OS X:Mozilla Firefox Project (Development Information).
It's impressive. I tried Camino 1.0a yesterday, but it had too much type lag on a slower machine to be useful. In contrast, Firefox 1.5 is very snappy. It feels much faster than 1.0 on my old G3 iBook and it's even faster than Safari.
Camino's aesthetics weren't the best either. Fonts and buttons were a bit off. Firefox looks at least as good as Camino (neither can rival Safari though).
I think Firefox 1.5 will be quite astounding.