Mozilla to load faster in Linux 2.6
According to Mr Linux himself Linus Torvalds, Mozilla is gonna load faster by improving the read-ahead heuristics for page faulting in the executable images.
Source: Torvalds on OSDL, 2.6, and the future
Recent changes to Mozilla Thunderbird here. It might soon be my standard mailclient. I'm currently use Mozilla Mail.
Improvements in DHTML performance are underway.