I believe with GoogleApps all of your files remain in the cloud so doing productivity work wouldn't take up any storage space. With MobileMe when you access one of your files does it have to download onto your computer/iPad? What about using Dropbox? If it doesn't download then perhaps 16GB is big enough for me. I don't plan on storing pics or music or video on my iPad. Will watch video podcasts then delete. Will download pics from Internet or from email attachments, view and delete. Or transfer to my Mac if I want to keep them.