Aspire One 722? I suggest you return it and get this instead. It'll save you money since it already has 4gb and give you a better screen resolution 1366x768 for the same size:
Acer Aspire TimelineX 1830TZ-4858 w/ Pentium U5600, 4GB, 320GB, 11.6in HD, Win 7 Home Premium 64-bit at Memory Express Computers
I currently use this laptop and it's been awesome.