Stacks. They're a cute little way to organize files, and akin to a start menu. Apple has even taken the time to make the stacks expand on a curve, so that when you move your hand, the arc it makes is in line with the stack. Now, I don't have a Leopard beta, so I'm just going off of the photos I've seen, but it seems to be that this is only good if you're a righty. If you're a lefty, the arc is facing the wrong direction, and trying to use it would seem rather un-ergonimical, to say the least. Could someone with the beta be able to tell me if, as a lefty, stacks are a pain to use or if you can change the direction they arc out? Since stacks are public, I don't think it would be breaking any NDA's (but obviously I wouldn't know as I didn't sign one). And if they are a pain to use, I'm thinking that I'll file a bug report/enhancement request on the ADC bug reporter.