I just came back from the Apple store at Polo Park. Before I handed my computer over though, I had to sign a waiver saying the store wouldn't be liable for any lost work. I of course have not backed up my work (it's on my list of things to do along with dusting), so I had to sit their and back all my work up on my gmail account, which is a great tool by the way. The wireless internet connection cut out a couple of times, and I had to restart. So don't go through the embarrassment like me and back up your work! Get a hard drive, store work in at least 3 places, and you'll hopefully never have the Apple Genius staring back at you like you're from the far past and has never heard of an external hard drive.