HOW TO: Use Gmail as Your Universal Email Account
Having a multitude of email addresses, I thought of simplyfing my life and workflow one day. I 
realized I’ve been wasting too much time checking up on my email from various places. There are the different Gmail accounts, Yahoo mail accounts, and even those from my own domains.
As for domains, I actually had some applications for Gmail for domains activated already–this means I could use Gmail as the default mail handler for my domain email. No more of that crappy webmail that usually comes with hosting subscriptions. In my opinion, Gmail is simply the best webmail application ever. Just an opinion, of course, but who doesn’t like that threaded-mail view and the simple interface (no clutter like those of Yahoo! and Hotmail). Google Tutor » Using Gmail as Your Universal Email Account