On iPod Touch should I access my Gmail account through the built in Mail app or Safari?

you can use either. both have advantages and disadvantages. for one thing, the mail app uses a separate signature, so if you use your gmail signature, you'll have to set it up in the mail app.
On iPod Touch should I access my Gmail account through the built in Mail app or Safari?
i would do it through the buitl in mail app. the reason is because you will get updates everytime you get a new email.