Hi, My 64GB SDD MBA arrived yesterday afternoon (along with my new iMac). When I initially turned it on, it showed approximately 39GB of free Hard Drive space. Having read so many of the posts here (thank you, all) , I knew that I wanted to reinstall OSX and then use XSlimmer on top of all that. I followed the excellent instructions in the guide on MacRumors for reinstalling using a superdrive, but step 12 didn't work as advertised for me. It says.... "12. When the Installer is done with Mac OS X DVD #1, the MacBook Air will automatically restart and eject OS X DVD #1. When this occurs, go ahead and insert OS X DVD #2; YOU MAY NOT BE EXPLICITLY TOLD TO INSERT THE DVD. Insert the DVD and installation will continue automatically for about 10 to 20 more minutes. When installation is complete, you will be prompted to click Continue" For me, it DID reboot itself, but it DID NOT spit out disc 1, and instead just started with the usual welcome screens and set ups. Kind of worried that I'd done something wrong I manually ejected disc 1 and put in disc 2, but the machine did nothing and just sat there happily wanting me to complete the language choice and the set up. So, very sensibly, I just did the reinstall all over again!!! Exactly the same thing. So I just went with it and completed the set up, and the machine worked perfectly. Being curious, I put disc 2 in the machine anyway, and all that is on there is a pdf file (about nothing) and the Xcode tools file. As I figured I didn't want to use those tools, I just popped the disc out and got on with loading apps. It works fine. So does anyone know why I didn't need 20 minutes of disc 2? Has apple redone their start up discs so everything you actually need is on Disc1? Or are the Xcode things vital and I just don't know it yet? The other thing that might be of interest is that having left out ALL the printer drivers, all the languages, iWeb, iDVD and GarageBand, and having installed iWork, Numbers, Keynote, Word 2008, Excel 2008, Powerpoint 2008 and iPhoto, and having updated to 10.5.3, I now have approximately 45GB of space. Oh, and I have also installed Xslimmer and used it.... The machine is fast, silent, and 10 minutes of a youtube video this morning didn't seem to cause any stress at all. I am now proud to be loving my MBA!