one of the greatest features of a g-apps mailbox is the google-email-uploader (with a free gmail-account that doesn’t work). with this tool you can upload all your mail-archives – you just need a running Outlook2003+ installation and your old archives (pst-files) attached to it. Then close Outlook and start the tool – after you have choosen whether you want it to create labels from the foldernames or just archive all the imported emails, it will look like this:
but don’t forget to do a backup of all your emails somewhere else – you’ll never know 
