I think it may be more a factor of where you're surfing. Does it ever crash for you here at EIC? It hasn't for me.
Nor at TUAW, Digg, Reddit, Slashdot, nor most of the other bookmarks I frequent. Now, when I hit graphically-intensive pages like
http://kyw1060.com then it's more likely to crash. With the current background, it's likely the page is simply too ugly for the iPhone.