So I love the Apple Safari 4 beta -- it is screamingly fast and it runs nicely on a PPC Mac (unlike Chrome, which only runs on Intel).
One big drawback, when compared with Firefox, is that targeted links cannot be forced to open in a new tab instead of a new window (the preference setting has no effect).
Turns out that there is a way to make this work: Open a Terminal window and type
defaults write com.apple.Safari TargetedClicksCreateTabs -bool true
And restart Safari. That's it.
(Now, if only Safari 4 supported blogger's wysiwyg editing features.)