If you don't use spaces, it won't be cluttering up anything. If you have two active screens, then your second screen will be located in the top right corner of mission control. If you're not using spaces, nothing will be there. I tried to take a picture of it, but it wouldn't let me snap one while in MC.
I upgrade both of our laptops yesterday. My wife's was flawless but I had to reinstall all of my M$ apps. I also had to reestablish our Boot Camp partitions in VMWare Fusion on both of our laptops. After that it has been pretty smooth sailing.
Anyone able to play around with this more? One thing that's stumped me: I put my Mail and Calendar on separate desktops and I just scroll to them when I need them. However, it appears that Desktop 4 (where iCal is) has jumped ahead of Desktop 3 (Apple Mail) in the scrolling order. Mission Control shows Desktop 1, Desktop 2, Desktop 4, Desktop 3 -- I have no clue why the two switched places. Anyone have an idea?
I installed it yesterday and everything seems pretty smooth. I do like some of the features but a few of them I had to change up. The first one I did was changing the inverse scrolling with the trackpad. I am used to going down for down and up for up. The other thing I had to change was the back and forward for browsing since it wasn't working like the old system I changed it where three fingers still went back and forth. Also swiping up with 4 fingers to get expose instead of down which I was used to is taking a bit to get used to but I do like how it groups them by program now. Or if you swipe down with 3/4 fingers you get all of the windows of that active program showing up. Love the mail program compared to the old one. Much easier to read things and the conversation style makes it that much better. I haven't messed with too many other things at the moment but for the most part it's been nice.
If you want to be super secure you could Zero out the harddrive. It rewrites 0's to the entire drive. You can actually set it to do once, 7 times or 35 times. 7 times is the DOD standard right now.