Panther

Today was a special occasion; for the first time, I *legally* installed an Apple OS beta.
Today was also a hellish occasion, as the install went fine until it came time to reboot. At this point my machine would either not finish the boot sequence or kernel panic seven seconds after I hit the power button. Installing Panther a second time, however, seems to have fixed this.
While I won’t go all nitty-gritty (haven’t played with it enough, no desire to sound like a shilling whore, NDA), I will say that Expose is extremely swank.