Hey guys, Just got my MBA 13" Ultimate yesterday (loving it btw, my first mac ever ) and I've been having a look into FileVault and will most likely want to use it due to the fact that this will have a lot of personal files and documents stored, as well as things for work. Does anyone know if this will cause much slowdown or noticeably affect performance on the MBA? Cheers. PS. As a side question, does anyone know if the drive will still be readable from Windows 7 with MacDrive after using FileVault?