Advantages of using it as POP? Well, first of all, there's the obvious web-mail advantages of also being able to access your mail away from home. I also use the Gmail notifier which notifies me when I receive an email along with who it's from, what the subject is, etc. so that I don't have to open my mailbox unless I want to read it right now. I also have it set up so that when I delete the mail from my inbox it's automatically archived. This way you have no email on your hard-drive but have it all backed up on Google's servers and can search through it using their system. Basically, best of both worlds in all categories.