Lots of buzz about Apples new Safari browser. So far David Hyatt hasn't said that he can't work on Phoenix (would this be a conflict of interest for him). Whilst I would really love to work with Mac OSX, I think Apple hardware is quite expensive given that the economy is still in the doldrums
One thing which I found interesting is that the Safari team consists of a lot of ex-Eazel guys. It's strange to see so many ex-Gnomer's now using KDE code daily.
Boris Barsky has been mentioning at times that whilst Gecko rules today in terms of compliance, if work doesn't continue to fix some design issues, it may lag behind. Who knows, maybe at some point someone will comeup with pluggable rendering engines for browsers (switch between Gecko,KHTML)
Lurking on the GCC list, I have read a fair amount of posts from Apple which describes how they would like to speed up GCC (I think they have a 6x target). Hope they can send some patches over soon or maybe this might occur after the next keynote where Steve Jobs will announce "Turbo Apple GCC" :)