I had been meaning to do this for so long and never did because I preferred Gmail over any native app that was available. Luckily I tried Sparrow (http://sparr

I had been meaning to do this for so long and never did because I preferred Gmail over any native app that was available. Luckily I tried Sparrow (http://sparrowmailapp.com http://sparrowmailapp.com) about 2 months ago and never looked back. I think the initial download of my "All Mail" folder took 12+ hours but I can rest assure I have a backup of my email on my hard drive and my backup hard drive (for which SuperDuper is awesome: http://www.shirt-pocket.com/SuperDuper http://www.shirt-pocket.com/SuperDuper).