Nothing surprises me more than the fact that my tiny netbook (an 11.6" Acer) came with a 64-bit version of Windows 7. Yet even though the OS is 64-bit, there needs to be 64-bit apps to properly utilize it. Currently, the most popular browsers only offer a 32-bit flavour, but it's okay because both the 32-bit and 64-bit versions of Microsoft Internet Explorer have been packaged with Windows 7.
Unfortunately, there's no 64-bit Flash player. When will Adobe come out with a 64-bit player? It doesn't seem like it's any time soon.