I just bought a MacBook Air (eagerly awaiting shipment), and since most people view the MBA as a "companion" to a desktop computer... I'm looking for an easy (hopefully automated) and effective way to keep files on the MBA and my desktop Mac in sync. I realize that with the limited disk space on the MBA, I can't (and don't want to) sync everything, just certain folders/files. I have a .Mac account, but I find iDisk to be incredibly slow. Any ideas? Thanks for your help.