I've been thinking about this recently, and wanted some input. I've been a GMail user for years (since it was in its first beta days). Now that I'm all-mac (MBP, iPad, iPhone), I've been considering switching to iCloud for my mail client. I'd gain push to my phone, instead of IMAP download every 15 minutes. That would conserve battery life quite a bit. I have 3 Gmail accounts (and one school account, which would remain IMAP). I can create the same addresses as aliases in iCloud, and just forward mail from my Gmail account to there. My reply addresses would be those same aliases, but @me.com instead of @gmail.com, right? So supposing I do all of this, how would I go about backing up all of my e-mails? I'd like to have maybe the last 5 or 6 months worth of e-mail on my iCloud server, but the rest I can just store locally on my MBP. Do you guys have any insight on that? Is this even worth it? I'd still use GMail to handle my calendar (through iCal), because I share the calendar with my wife and she uses exclusively gmail for her calendar. Thoughts?