anyone doing this. I have an external hard drive hooked up to my airport extreme. I have approximately 5-6 Gbs on it and it is for shared office files. I would like to be able to automatically back this data up off site. I can't seem to be able to do it with mobile me, and I don't want to have to unplugged it and take it off site to back up. Mobile me would have been great. Any suggestions?